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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

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

                                    FORM 8-K

                                 CURRENT REPORT

                         Pursuant to Section 13 or 15(d)
                     of the Securities Exchange Act of 1934

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

       Date of Report (Date of earliest event reported): November 19, 2004


                                ACNB CORPORATION
                                ----------------
             (Exact name of registrant as specified in its charter)


Pennsylvania                            0-11783                   23-2233457
-------------------------       -----------------------      -------------------
(State or other                 (Commission File Number)     (IRS Employer
jurisdiction of                                              Identification No.)
incorporation)


 16 Lincoln Square Gettysburg, PA                                17325
------------------------------------------                     ----------
(Address of principal executive offices)                       (Zip Code)

                                 (717) 334-3161
              ----------------------------------------------------
              (Registrant's telephone number, including area code)

         Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

     [ ]  Written communications pursuant to Rule 425 under the Securities Act
          (17 CFR 230.425)
     [ ]  Soliciting material pursuant to Rule 14a-12 under the Exchange Act
          (17 CFR 240.14a-12)
     [ ]  Pre-commencement communications pursuant to Rule 14d-2(b) under the
          Exchange Act (17 CFR 240.14d-2(b))
     [ ]  Pre-commencement communications pursuant to Rule 13e-4(c) under the
          Exchange Act (17 CFR 240.13e-4(c))


<PAGE>


                                ACNB CORPORATION
                           CURRENT REPORT ON FORM 8-K

ITEM 1.01 Entry into a Material Definitive Agreement

On November 19, 2004, ACNB Corporation and ACNB Acquisition Subsidiary LLC
entered into a definitive agreement to purchase Russell Insurance Group Inc. A
copy of the press release, dated November 19, 2004, announcing the transaction
is attached as Exhibit 99.1 to this Current Report on Form 8-K.

Under the terms of the definitive agreement, ACNB Corporation has agreed to pay
$4,750,000.00 in cash to acquire Russell Insurance Group. Additional
consideration of up to $2,882,000.00 is subject to performance criteria for
payment over the next three years.

Upon completion of the transaction, Russell Insurance Group, Inc. will continue
to operate as a separate subsidiary of ACNB Corporation. In addition, ACNB
Acquisition Subsidiary LLC has entered into a three year employment contract
with Frank C. Russell, Jr., the President of Russell Insurance Group, Inc.

Assuming that all conditions are satisfied without delay, it is anticipated that
the effective date of the transaction will occur during the fourth quarter of
2004.


ITEM 9.01 Financial Statements and Exhibits.

(c) Exhibits.

Exhibit Number             Description

99.1     Press Release dated November 19, 2004, issued by ACNB Corporation.


<PAGE>

                                    SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.


ACNB CORPORATION



Date:  November 22, 2004                                BY: /s/ Thomas A. Ritter
                                                        ------------------------
                                                        Name: Thomas A. Ritter
                                                        Title: President
                                                        Chief Financial Officer


</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>ex-99.txt
<TEXT>
FOR IMMEDIATE RELEASE

                                                        Contact: Lynda L. Glass
                                                                  (717)338-2257

                       ACNB Corporation Agrees to Acquire
                          Russell Insurance Group, Inc.

Gettysburg, Pa., November 19----ACNB Corporation announced today that it has
entered into an agreement to acquire the Russell Insurance Group, Inc., a
full-service insurance agency that offers a wide range of property and casualty,
life, and health insurance to both commercial and individual clients.

      The transaction includes the right to use the company's name ("Russell
Insurance Group"), and the agency will continue to be led by Frank C. Russell,
Jr. The acquisition is consistent with ACNB Corporation's organizational focus
on building customer banking relationships by serving and fulfilling customers'
financial product and service needs. Russell Insurance Group will provide yet
another touchpoint for its customers.

      "It was an easy decision to join forces with Russell Insurance Group,"
said Ronald L. Hankey, ACNB Corporation's Chairman. "Russell Insurance Group has
an outstanding reputation, a knowledgeable and experienced management team, an
excellent group of employees, and a strong commitment to their clients. In
addition, they bring expertise in providing full-service insurance programs and
in acquiring small general lines agencies."

      "Insurance is a key new focus in our comprehensive financial services
offering," said Thomas A. Ritter, President and CEO of ACNB Corporation. "With
Russell Insurance Group, we will gain top-notch insurance industry expertise, be
able to expand insurance products throughout our trade area, and enhance

<PAGE>


ACNB CORPORATION
Press Release/Russell Insurance Group
November 19, 2004
Page 2


shareholder value. In addition to our current banking services, this acquisition
will complement our other financial services such as trust, brokerage, and tax
and accounting."

      Based in Westminster, MD, with a satellite office in Timonium, MD, Russell
Insurance Group has served the insurance needs of its clients since its founding
by Frank C. Russell, Jr. in 1978. Total annual revenues are approximately $4
million. The majority of Russell Insurance Group revenues are commissions
related to property and casualty insurance, plus group benefits insurance. All
employees of Russell Insurance Group will be retained to meet the needs of its
customers, as well as those customers of ACNB Corporation's banking subsidiary,
Adams County National Bank.

      "We are pleased to be able to join a company like ACNB Corporation," said
Frank C. Russell, Jr., President of Russell Insurance Group, Inc. "Our business
has grown successfully over the last several years, and we look forward to
continuing to serve clients through a more expanded financial services offering.
This union is good for our customers, as well as our employees."

      The acquisition is anticipated to close during the fourth quarter of 2004,
subject to varying approvals. The acquisition is structured as an all cash
transaction with an approximate aggregate value of $4,750,000.00 initially and
an earn-out provision that may result in additional consideration at the end of
three years after the effective date of the transaction.

      ACNB Corporation is the financial holding company for Adams County
National Bank, Gettysburg, PA. Originally founded in 1857, Adams County National
Bank serves its marketplace via a network of fifteen retail banking offices
located throughout Adams County, PA, and in Dillsburg and Hanover, York County,
PA. Farmers National Bank of Newville, a division of Adams County National Bank,
operates three retail banking offices in the Newville, Cumberland County, PA,
area. On September 30, 2004,


<PAGE>

ACNB CORPORATION
Press Release/Russell Insurance Group
November 19, 2004
Page 3


ACNB Corporation had total assets of $945 million.

      Garland McPherson and Associates served as financial advisor to ACNB
Corporation for the transaction and Shumaker Williams, P.C., served as legal
counsel.
                                      # # #

ACNB #2004-20
November 19, 2004

Forward-Looking Statement. This press release may contain certain
forward-looking statements, within the meaning of Section 27A of the Securities
Act of 1933, as amended, and Rule 175 promulgated thereunder, and Section 21E of
the Securities Exchange Act of 1934, as amended, and Rule 3b-6 under the
Securities Exchange Act, including certain plans, expectations, goals and
projections, about the benefits to ACNB Corporation of its acquisition of
Russell Insurance Group. These forward-looking statements are subject to
numerous assumptions, risks and uncertainties. Actual results could differ
materially from those contained or implied by such statements for a variety of
factors such as: the businesses of ACNB Corporation and Russell Insurance Group
may not be integrated successfully or such integration may take longer to
accomplish than expected; the expected synergies from the acquisition may not be
fully realized within the expected timeframes; disruption from the acquisition
may make it more difficult to maintain relationships with clients, associates or
suppliers; the required approvals of the merger may not be obtained on the
proposed terms and schedule; and, other factors described in ACNB Corporation's
2003 Annual Report on Form 10-K as filed with the Securities and Exchange
Commission. All forward-looking statements included in this news release are
based on information available at the time of the release. Neither ACNB
Corporation nor Russell Insurance Group assumes any obligation to update any
forward-looking statement.

</TEXT>
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