 Larimer Township is bordered by Northampton Township to the northeast, Southampton Township to the southeast, Greenville Township to the southwest, and Summit & Brothersvalley Townships to the northwest.Pennsylvania Route 160 passes through Larimer Township, heading northwest from Wellersburg & Southampton Township on its way to Northampton Township & Brothersvalley Township.The Eastern Continental Divide passes through Larimer Township, along the mountain summit above Sand Patch Tunnel.