[3] Longswamp is home to Bear Creek Mountain Resort, just south of Maple Grove.

Longswamp Township's villages include Farmington, Hancock, Henningsville, Longsdale, Longswamp, Maple Grove, Mertztown, New Hensingersville (also in Lehigh County,) Red Lion, Rittenhouse Gap, and Seisholtzville (also in Hereford Township.)

It has a hot-summer humid continental climate (Dfa) and the hardiness zone is 6b.

The average monthly temperatures in Mertztown range from 29.2 °F in January to 73.8 °F in July.

19.2% of all households were made up of individuals, and 8.2% had someone living alone who was 65 years of age or older.

The main east-to-west thoroughfare in the township is State Street, which is part of an unnumbered straight chain of roads connecting northeastern and central Berks County, as well as Topton with Lyons and Fleetwood.