Glenolden is a borough in Delaware County, Pennsylvania, United States.

According to the United States Census Bureau, Glenolden has a total area of 0.97 square miles (2.52 km2), all land.

[5] The main road through the borough is Chester Pike (U.S. Route 13), which leads northeast 9 miles (14 km) to the center of Philadelphia and 5 miles (8 km) southwest to Chester.

As of Census 2010, the racial makeup of the borough was 86.9% White, 8.5% African American, 0.1% Native American, 1.7% Asian, 0.1% Native Hawaiian and Other Pacific Islander, 0.3% from other races, and 2.4% from two or more races.

33.1% of all households were made up of individuals, and 11.5% had someone living alone who was 65 years of age or older.

The school district's administration offices are located in Prospect Park.