The Neshaminy Presbyterian Church is one of the earliest religious associations in Pennsylvania, dating back to 1726.

There are nearby historical homes such as the Reading Furnace, which was owned by prominent ironmaster Samuel Van Leer.

While in Warwick Township, the American flag that was designed by Betsy Ross was presented to General Washington, and Warwick Township was the site where the American flag was first flown.

It was here the Marquis de La Fayette and Count Casimir Pulaski joined the American Revolution and distinguished themselves at the Battle of Brandywine and for many years thereafter in the fight for American freedom from England.

According to the United States Census Bureau, the township has a total area of 11.1 square miles (28.9 km2), all land.

It is drained by the Delaware River via the Neshaminy Creek, which forms part of Warwick's northern border.

On average, the wettest month of the year is July which corresponds with the annual peak in thunderstorm activity.

The plant hardiness zone is 7a with an average annual extreme minimum air temperature of 0.1 °F (-17.7 °C).

Almshouse Road runs northwest–southeast through the center of the township and crosses PA 263 in Jamison.

Bristol Road runs northwest–southeast along the southern border of the township and crosses PA 263 in Hartsville.