Chalfant is a borough in Allegheny County, Pennsylvania, United States.

[6] According to the United States Census Bureau, the borough has a total area of 0.2 square miles (0.52 km2), all land.

Chalfant has three borders, including Wilkins Township from the northeast to southeast, North Braddock to the southwest, and Forest Hills to the northwest.

There were 449 housing units at an average density of 2,837.8 per square mile (1,095.7/km2).

37.8% of all households were made up of individuals, and 14.3% had someone living alone who was 65 years of age or older.