Allenport is a borough on the Monongahela River in Washington County, Pennsylvania, United States and part of the Pittsburgh metropolitan area since 1950.

[4] Allenport is located on State Route 88, approximately 3 miles (4.8 km) northeast of California, on the west bank of the Monongahela River.

There were 261 housing units at an average density of 132.5 per square mile (51.2/km2).

The racial makeup of the borough was 99.27% White, 0.36% African American, and 0.36% from two or more races.

26.3% of all households were made up of individuals, and 16.0% had someone living alone who was 65 years of age or older.