According to the U.S. Census Bureau, the township has a total area of 10.7 square miles (28 km2), all land.

[3] U.S. Route 30 is the most prominent highway serving West Sadsbury Township.

Pennsylvania Route 10 follows Octorara Trail along a north–south alignment along the northeastern border of the township.

Pennsylvania Route 41 follows Gap Newport Pike along a northwest–southeast alignment across the southwestern portion of the township.

Pennsylvania Route 372 follows Valley Road along an east–west alignment across the southern part of the township.