23.53% of all households were made up of individuals, and 12.11% had someone living alone who was 65 years of age or older.

[1] It is drained by the Lehigh River, which separates it from Bethlehem and the east side of Allentown, and borders Upper Saucon Township on South Mountain.

Emmaus and Allentown share a border, separating Salisbury into two demographically distinct non-contiguous portions.

The township's villages of Farmington, Gauff Hill and Summit Lawn are in the eastern portion.

Salisbury Township has a hot-summer humid continental climate (Dfa) and is in hardiness zone 6b.

The average monthly temperature in the vicinity of South Mall ranges from 29.0 °F (−1.7 °C) in January to 73.7 °F (23.2 °C) in July.