Glen Allen is a town located in Fayette and Marion counties in the U.S. state of Alabama.

Glen Allen is positioned along the BNSF railway and is near Interstate 22, providing access to multiple expanding industries.

Glen Allen is located on the border of Fayette and Marion counties at 33°53′58″N 87°43′49″W / 33.89944°N 87.73028°W / 33.89944; -87.73028 (33.899470, -87.730388).

Interstate 22 passes 5 miles (8 km) north of the town, with access from Exit 34.

The corporate limits of Glen Allen include the communities of Hubbertville and Bazemore.