Parker is a city located in Armstrong County, Pennsylvania, United States.

Parker was incorporated as a city on March 1, 1873, by special state legislation in the midst of the northwestern Pennsylvania oil boom.

The boom quickly went bust, however, and by the 1880s the "city" returned to its historic small village size—a population of approximately 1,000.

Parker received national attention again in 2014 when a massive ice jam along the Allegheny River formed and started some minor flooding.

There is also an intersection with PA 368 at the Parker Bridge.The Allegheny River, at this point is not used to transport goods and materials, but is still a navigable waterway for boating.

9, is located south of Parker, just past the borough of East Brady.

[7] According to the United States Census Bureau, the city has a total area of 1.1 square miles (2.8 km2), all land.

Parker has two land borders, with the townships of Hovey to the north and Perry to the south.