Abner Lacock (July 9, 1770 – April 12, 1837) was an American politician from Rochester, Pennsylvania.

Abner Lacock was born on July 7, 1770, near Alexandria in the Colony of Virginia.

He served as chairman of the United States Senate Committee on Pensions during the Fifteenth Congress.

After he left Congress, he was appointed a State commissioner to survey routes for canals and railways in Pennsylvania in 1825.

This article about a member of the United States House of Representatives from Pennsylvania is a stub.