Harahan is located along a heavily-wooded area along a curve in the Mississippi River, between River Ridge to the west and Elmwood to the east. Harahan's main road is Jefferson Highway which changes from Claiborne Avenue as it enters Jefferson Parish and dead ends in Kenner at the intersection of Williams Blvd.

One of Harahan's more notable structures is Harahan Elementary, located along Jefferson Highway. Its current structure was opened to students in January, 1926. In 1983, it was added to the Department of the Interior's National Register of Historic Places.