Jacksonville is an unincorporated American community and census-designated place[1] that is located in Marion Township, Centre County, Pennsylvania.

[2] The town is located in the Little Nittany Valley, 10 miles (16 km) northeast of Bellefonte, the Centre County seat.

Howard Gap in Bald Eagle Mountain is located just to the northwest of the town.

Pennsylvania Route 26 passes through the gap, leading 2.5 miles (4.0 km) to the borough of Howard.

Interstate 80 passes through the Little Nittany Valley just southeast of Jacksonville.