As filed with the Securities and Exchange Commission on July 8, 2005    

                                                 Registration No. 333-__________


                       SECURITIES AND EXCHANGE COMMISSION
                              Washington, DC 20549
                      ------------------------------------
                                    FORM S-8
                             Registration Statement
                        Under the Securities Act of 1933
                      ------------------------------------
                             Acme United Corporation
             (Exact name of Registrant as specified in its charter)

                Connecticut                               06-0236700
        (State or other jurisdiction of                (I.R.S. Employer
        incorporation or organization)              Identification Number)

                            1931 Black Rock Turnpike
                          Fairfield, Connecticut 06825
          (Address of principal executive offices, including zip code)

      Acme United Corporation 2005 Non-Salaried Director Stock Option Plan
       Acme United Corporation 2002 Employee Stock Option Plan, as amended
                            (Full Title of the Plans)
                                -----------------

                                  Paul Driscoll
                             Chief Financial Officer
                            1931 Black Rock Turnpike
                          Fairfield, Connecticut 06825
                     (Name and address of agent for service)

                                 (203) 332-7330
          (Telephone number, including area code, of agent for service)


                                    copy to:
                              Merritt A. Cole, Esq.
                               Dilworth Paxson LLP
                             3200 Mellon Bank Center
                               1735 Market Street
                        Philadelphia, Pennsylvania 19103
                              Phone (215) 575-7000
                               Fax (215) 575-7200
                                -----------------



                         CALCULATION OF REGISTRATION FEE
=========================================================================================================

            Title of                           Proposed Maximum      Proposed Maximum       Amount of
        Securities To Be     Amount Being       Offering Price           Aggregate        Registration
           Registered        Registered(1)        Per Share          Offering Price            Fee
---------------------------------------------------------------------------------------------------------
                                                                                     
Common Stock, par value
$2.50 per share.............    151,938             $17.99(2)            $2,733,365(2)      $321.72
---------------------------------------------------------------------------------------------------------
Common Stock, par value
$2.50 per share.............    171,500             $17.02(3)            $1,826,508(3)      $214.98
---------------------------------------------------------------------------------------------------------
Common Stock, par value
$2.50 per share.............      7,500             $15.15(4)              $113,625(4)       $13.37
---------------------------------------------------------------------------------------------------------

TOTAL                           330,938                                                     $550.07
=========================================================================================================




(1)      Pursuant to Rule 416 under the Securities Act of 1933, as amended, the
         number of shares of the issuer's Common Stock registered hereunder will
         be adjusted in the event of stock splits, stock dividends or similar
         transactions.
(2)      Estimated solely for the purpose of calculating the registration fee
         pursuant to Rules 457 (c) and 457 (h) under the Securities Act of 1933,
         as amended (the "Securities Act"), based upon the average of the high
         and low prices for a share of Common Stock reported on the American
         Stock Exchange as of July 1, 2005.
(3)      Calculated  pursuant to Rule 457 (h)(1) under the  Securities  Act; the
         171,500  shares are  issuable  upon  exercise  of  outstanding  options
         granted under the 2002 Employee  Stock Option Plan,  which options have
         exercise prices in the range of $3.35 - $17.02 per share.
(4)      Calculated  pursuant to Rule 457 (h)(1) under the  Securities  Act; the
         7,500 shares are issuable upon exercise of outstanding  options granted
         under the 2005  Non-Salaried  Director Stock Option Plan, which options
         have an exercise price of $15.15 per share.







                                     Part I
              INFORMATION REQUIRED IN THE SECTION 10(a) PROSPECTUS

The documents containing the information specified in Part I of Form S-8 will be
sent or given to participants as specified by Rule 428(b)(1) promulgated under
the Securities Act of 1933, as amended (the "Securities Act"). Such documents
need not be filed with the Securities and Exchange Commission (the "Commission")
either as part of this Registration Statement or as prospectuses or prospectus
supplements pursuant to Rule 424. These documents and the documents incorporated
herein by reference pursuant to Item 3 of Part II of this Registration
Statement, taken together, constitute a prospectus that meets the requirements
of Section 10(a) of the Securities Act (the "Prospectus").

Explanatory Note.

This Registration Statement on Form S-8 is being filed for the purpose of
registering:

(i)               50,000 shares of common stock, par value $2.50 per share (the
                  "Common Stock") of Acme United Corporation (the "Company")
                  which may be issued pursuant to the Company's 2005
                  Non-Salaried Director Stock Option Plan (the "Director Plan");
                  and

(ii)              280,938 shares of Common Stock which may be issued pursuant to
                  the Company's 2002 Employee Stock Option Plan (the "Employee
                  Plan"). 

Pursuant  to Rule 416 under  the  Securities  Act,  an  indeterminate  amount of
additional  shares of Common Stock,  which may become  issuable  pursuant to the
anti-dilution  or other  adjustment  provisions of the option plans  referred to
above, are also being registered hereunder.

In February  2002,  the Board of Directors of the Company  approved the Employee
Plan, subject to stockholder approval. Stockholder approval of the Employee Plan
was received at the Annual  Meeting of  Stockholders  held on April 22, 2002. In
February 2005, the Board of Directors of the Company  approved the Director Plan
as well as an amendment to the Employee Plan to increase the number of shares of
Common  Stock which may be issued  pursuant to the  Employee  Plan from  150,000
shares to 300,000  shares,  both subject to  stockholder  approval.  Stockholder
approval of the Director  Plan and of the  amendment  to the  Employee  Plan was
received at the Annual Meeting of Stockholders held on April 25, 2005.  (Options
to purchase a total of 19,062  shares of Common  Stock under the  Employee  Plan
have been previously  exercised and such 19,062 shares are not being  registered
hereunder.)


                                     Part II
               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

Item 3.      Incorporation of Documents by Reference.

The following documents previously filed with the Commission are incorporated by
reference and made a part of this prospectus.

          |X|  our Annual  Report on Form 10-K for the year ended  December  31,
               2004;

          |X|  our Quarterly Report on Form 10-Q for the quarter ended March 31,
               2005;

          |X|  our Current Reports on Form 8-K filed February 9, 2005,  March 3,
               2005,  March 11, 2005,  March 30, 2005, March 31, 2005, and April
               21, 2005; and

          |X|  the  description  of our Common  Stock  contained in the Form 8-K
               filed on July 8, 2005  including  any amendment to that form that
               we may have filed in the past, or may file in the future, for the
               purpose of updating the description of our common stock.




All documents we have filed pursuant to Sections 13(a), 13(c), 14 and 15(d) of
the Securities Exchange Act of 1934 subsequent to the effective date of this
Registration Statement, prior to the filing of a post-effective amendment which
indicates that all securities offered by this prospectus have been sold or which
deregisters all securities then remaining unsold, shall be deemed to be
incorporated by reference in this prospectus and to be a part of this prospectus
from the date of filing of such documents. Any statement contained herein or in
any document incorporated or deemed to be incorporated by reference shall be
deemed to be modified or superseded for purposes of this Registration Statement
to the extent that a statement contained in any other subsequently filed
document which also is or is deemed to be incorporated by reference modifies or
supersedes such statement. Any such statement so modified or superseded shall
not be deemed to constitute a part of this Registration Statement, except as so
modified or superseded.

Item 4.      Description of Securities.

Not Applicable.

Item 5.      Interest of Named Experts and Counsel.

None.

Item 6.      Indemnification of Directors and Officers.

Connecticut General Statutes Sections ("CGS") 33-771 through 33-778 provide for
mandatory, permissive and court-ordered indemnification of directors who are
parties to a proceeding. For purposes of these indemnification statutes a
"proceeding" is defined as any threatened, pending or completed action, suit or
proceeding, whether civil, criminal, administrative or investigative and whether
formal or informal.

The Company's Restated Certificate of Incorporation provides that the Company
shall indemnify an individual who is a party to a proceeding because he is a
director or officer of the corporation against liability in the proceeding if:

             (1)(A)  he  conducted  himself  in good  faith;  (B) he  reasonably
believed (i) in the case of conduct in his official  capacity,  that his conduct
was in the best interests of the corporation;  and (ii) in all other cases, that
his conduct was at least not opposed to the best  interests of the  corporation;
and (C) in the case of any criminal  proceeding,  he had no reasonable  cause to
believe his conduct was unlawful; or

             (2) such liability arises from any action taken, or any failure to
take any action, as a director or officer, except liability that (A) involved a
knowing and culpable violation of law by the director or officer; (B) enabled
the director, officer or an associate (as defined in the CGS) to receive an
improper personal gain; (C) showed a lack of good faith and a conscious
disregard for the duty of the director or officer to the corporation under
circumstances in which the director or officer was aware that his conduct or
omission created an unjustifiable risk of serious injury to the corporation; (D)
constituted a sustained and unexcused pattern of inattention that amounted to an
abdication of the director's or officer's duty to the corporation; or (E)
created liability under the CGS for the illegal payment of dividends.

The Registrant has obtained directors' and officers' reimbursement and liability
insurance against certain liabilities.




Item 7.      Exemption from Registration Claimed.

Not Applicable.

Item 8.      Exhibits.

The following exhibits are filed as part of this Registration Statement:

Exhibit No.   Identification of Exhibit

4.1           Restated Certificate of Organization(a)
4.2           Bylaws of the Company(b)
4.3           Specimen Common Stock Certificate(c)
4.4           2005 Non-Salaried Director Stock Option Plan(d)
4.5           2002 Employee Stock Option Plan, as amended
4.6           Form of Option Agreement
5.1           Opinion of Brody, Wilkinson and Ober, P.C.
23.1          Consent of Brody, Wilkinson and Ober, P.C. (included in 
              Exhibit 5.1)
23.2          Consent of Ernst & Young LLP, independent registered public 
              accounting firm
------------------
(a) Incorporated by reference to Exhibit 3(i) to the Company's Form 8-K filed on
July 8, 2005.
(b) Incorporated by reference to Exhibit 3(ii) to the Company's Annual Report on
Form 10-K for year ended December 31, 2004.
(c)  Incorporated by reference to Exhibit 4.1 to the Company's Form 8-K filed on
July 8, 2005.
(d)  Incorporated  by reference to Exhibit B to the Company's  definitive  proxy
statement on Schedule 14A filed on March 29, 2005.

Item 9.      Undertakings

The undersigned Registrant hereby undertakes:

 (1) To file, during any period in which offers or sales are being made, a
post-effective amendment to this registration statement:

         (a) To include any prospectus required by Section 10(a)(3) of the
Securities Act;

         (b) To reflect in the prospectus any facts or events arising after the
effective date of this Registration Statement (or the most recent post-effective
amendment thereof) which, individually or in the aggregate, represent a
fundamental change in the information set forth in this Registration Statement.
Notwithstanding the foregoing, any increase or decrease in volume of securities
offered (if the total dollar value of securities offered would not exceed that
which was registered) and any deviation from the low or high end of the
estimated maximum offering range may be reflected in the form of a prospectus
filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the
changes in volume and price represent no more than a 20% change in the maximum
aggregate offering price set forth in the "Calculation of Registration Fee"
table in the effective registration statement;

         (c) To include any material information with respect to the plan of
distribution not previously disclosed in this Registration Statement or any
material change to such information in this Registration Statement; provided,
however, that paragraphs (1)(a) and (1)(b) do not apply if the information
required to be included in a post-effective amendment by those paragraphs is
contained in periodic reports filed by the Registrant pursuant to Section 13 or
Section 15(d) of the Exchange Act that are incorporated by reference in this
Registration Statement.

(2) That, for the purpose of determining any liability under the Securities Act,
each such post-effective amendment shall be deemed to be a new registration
statement relating to the securities offered therein, and the offering of such
securities at that time shall be deemed to be the initial bona fide offering
thereof.





(3) To remove from registration by means of a post-effective amendment any of
the securities being registered which remain unsold at the termination of the
offering.

(4) That, for the purposes of determining any liability under the Securities
Act, each filing of the Registrant's annual report pursuant to Section 13(a) or
Section 15(d) of the Exchange Act (and, where applicable, each filing of an
employee benefit plan's annual report pursuant to Section 15(d) of the Exchange
Act) that is incorporated by reference in this Registration Statement shall be
deemed to be a new registration statement relating to the securities offered
therein, and the offering of such securities at that time shall be deemed to be
the initial bona fide offering thereof.

(5) Insofar as indemnification for liabilities arising under the Securities Act
may be permitted to directors, officers and controlling persons of the
Registrant pursuant to the foregoing provisions, or otherwise, the Registrant
has been advised that in the opinion of the Commission such indemnification is
against public policy as expressed in the Securities Act and is, therefore,
unenforceable. In the event that a claim for indemnification against such
liabilities (other than the payment by the Registrant of expenses incurred or
paid by a director, officer or controlling person of the Registrant in the
successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, the Registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Securities Act and will be governed by the final
adjudication of such issue.





                                   SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the Registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-8 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Fairfield, State of Connecticut, on the 8th day of
July, 2005.

                             ACME UNITED CORPORATION



                                By:   /s/ Walter C. Johnsen
                                      -----------------------------------------
                                      Walter C. Johnsen, President and Chief 
                                      Executive Officer


                          ----------------------------

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints Walter C. Johnsen and Paul Driscoll, or either of
them, as true and lawful attorneys-in-fact and agents with full power of
substitution and re-substitution, for him and in his name, place and stead, in
any and all capacities to sign the Registration Statement filed herewith and any
or all amendments to said Registration Statement, and to file the same, with all
exhibits thereto, and other documents in connection therewith, the Securities
and Exchange Commission granting unto said attorney-in-fact and agents the full
power and authority to do and perform each and every act and thing requisite and
necessary to be done in and about the foregoing, as to all intents and purposes
as he or she might or could do in person, hereby ratifying and confirming all
that said attorney-in-fact and agents or any of them, or his substitute, may
lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act of 1933, this Registration
Statement has been signed below by the following persons in the capacities and
on the dates indicated:



Signature                                            Title                                       Date
                                                                                             

/s/ Walter C. Johnsen                                President, Chief Executive Officer        July 8, 2005
--------------------------------------------         and Director
Walter C. Johnsen                           


/s/ Paul Driscoll                                    Vice President and                        July 8, 2005
--------------------------------------------         Chief Financial Officer
Paul Driscoll                               


/s/ Gary D. Penisten                                 Chairman of the Board                     July 8, 2005
--------------------------------------------
Gary D. Penisten


/s/ Wayne R. Moore                                   Director                                  July 8, 2005
--------------------------------------------
Wayne R. Moore


/s/ George R. Dunbar                                 Director                                  July 8, 2005
--------------------------------------------
George R. Dunbar






/s/ Richmond Y. Holden, Jr.                          Director                                  July 8, 2005
--------------------------------------------
Richmond Y. Holden, Jr.


/s/ Brian S. Olschan                                 Director                                  July 8, 2005
--------------------------------------------
Brian S. Olschan


/s/ Stevenson E. Ward III                            Director                                  July 8, 2005
--------------------------------------------
Stevenson E. Ward III


/s/ Susan H. Murphy                                  Director                                  July 8, 2005
--------------------------------------------
Susan H. Murphy








                                  Exhibit Index

Exhibit No.   Identification of Exhibit

4.1           Restated Certificate of Organization(a)
4.2           Bylaws of the Company(b)
4.3           Specimen Common Stock Certificate(c)
4.4           2005 Non-Salaried Director Stock Option Plan(d)
4.5           2002 Employee Stock Option Plan, as amended
4.6           Form of Option Agreement
5.1           Opinion of Brody, Wilkinson and Ober, P.C.
23.1          Consent of Brody, Wilkinson and Ober, P.C. (included in 
              Exhibit 5.1)
23.2          Consent of Ernst & Young LLP, independent registered public 
              accounting firm
------------------
(a) Incorporated by reference to Exhibit 3(i) to the Company's Form 8-K filed on
July 8, 2005.
(b) Incorporated by reference to Exhibit 3(ii) to the Company's Annual Report on
Form 10-K for year ended December 31, 2004. 
(c)  Incorporated by reference to Exhibit 4.1 to the Company's Form 8-K filed on
July 8, 2005.
(d)  Incorporated  by reference to Exhibit B to the Company's  definitive  proxy
statement on Schedule 14A filed on March 29, 2005.