According to the U.S. Census Bureau, the township has a total area of 13.4 square miles (34.7 km2), all land.

11.5% of all households were made up of individuals, and 5.2% had someone living alone who was 65 years of age or older.

[5] Pennsylvania Route 33 is the most prominent highway serving Lower Nazareth Township.

Pennsylvania Route 191 follows the Nazareth Pike along a southwest–northeast alignment through the middle of the township.

Pennsylvania Route 248 follows Easton-Nazareth Highway along a northwest–southeast alignment across the northeastern portion of the township.

Pennsylvania Route 946 begins at PA 191 in the center of the township and heads northwestward along Daniels Road.