ACNB Bank, History
The following are major historical events for ACNB Bank, including mergers and acquisitions.
| 1857-04-11 | Institution established: Original name:The First National Bank of Gettysburg | |
| 1962-12-08 | Moved bank headquarters from GETTYSBURG, PA to LITTLESTOWN, PA | |
| 1962-12-08 | Changed name to Adams County National Bank | |
| 1978-12-31 | Moved bank headquarters from LITTLESTOWN, PA to GETTYSBURG, PA | |
| 1978-12-31 | Acquired The National Bank of Arendtsville (7379) in ARENDTSVILLE, PA | |
| 1987-04-01 | Acquired The Bendersville National Bank (7401) in BENDERSVILLE, PA | |
| 2000-10-01 | Acquired The Farmers National Bank of Newville (7661) in NEWVILLE, PA | |
| 2010-10-04 | Changed name to ACNB Bank | |
| 2010-10-04 | Changed primary regulatory agency from COMPTROLLER OF THE CURRENCY to FEDERAL DEPOSIT INSURANCE CORPORATION | |
| 2010-10-04 | Changed institution class to INSURED COMMERCIAL BANKS, STATE, NOT MEMBERS OF THE FRS | |
| 2017-07-01 | Acquired New Windsor State Bank (5866) in NEW WINDSOR, MD | |
| 2020-01-11 | Acquired Frederick County Bank (57255) in FREDERICK, MD |