Its villages include Jacksonville, Lochland (also in Heidelberg Township), Lynnville, Lynnport, New Tripoli, Stines Corners (also in Weisenberg), and Wanamakers.

Lynn Township has a humid continental climate (Dfa/Dfb) and the hardiness zones are 6a and 6b.

Average monthly temperatures in Lynnport range from 28.1 °F (−2.2 °C) in January to 72.9 °F (22.7 °C) in July.

18.3% of all households were made up of individuals, and 7.5% had someone living alone who was 65 years of age or older.

Lynn Township was established in 1732, a part of what was known as the Allemängel or Allemaengel.

Law enforcement is provided by the Pennsylvania State Police from their Fogelsville barracks.

[13] New Tripoli in Lynn Township houses a bank and post office.

In addition to a number of one-room schoolhouses and traditional Pennsylvania Dutch farms, local attractions include: The Appalachian National Scenic Trail passes along the northern portion of the township, and a very small portion of the Pennsylvania State Game Lands Number 106 is located in the northwestern corner of the township.