Ridley Township, Delaware County, Pennsylvania  Ridley Township is a township in Delaware County, Pennsylvania, United States. The population was 30,768 at the 2010 census. Ridley Township contains the census designated places of Folsom and Woodlyn along with the unincorporated communities of Crum Lynne and Holmes and a portion of Secane. Ridley Township derives its name from Ridley, Cheshire, England, where John Simcock, one of the original settlers, emigrated from. The first mention of Ridley in court records is from 1684 when tax collectors were appointed for the township. During the Revolutionary War, Ridley was traversed by both the Continental Army and the British Army. George Washington moved his troops through Ridley Township on his way to Wilmington, Delaware to oppose General Howe. After the Battle of Brandywine, Continental Army soldiers camped along the road in Ridley and George Washington spent the night in the home of John McIlvain. On November 19, 1777, General Cornwallis marched 3,000 men from Philadelphia through Ridley township. It was reported that the ""men robbed the inoffensive people on the route without mercy, taking food from the indigent widow as remorselessly from the wealthy husbandman."" On December 22, 1777, General Howe and troops passed through Ridley on their raid to and beyond Darby. Ridley Township is in southeastern Delaware County, northeast of Chester and southeast of Media, the county seat. The borough of Rutledge is in the northern part of the township but is a separate municipality. The unincorporated communities of Folsom, Secane and Woodlyn occupy the central and western parts of the township, respectively. According to the United States Census Bureau, the township has a total area of , of which is land and , or 3.61%, is water. Most of the water area is in the Delaware River in the southernmost part of the township. Ridley Township's hardiness zones are 7a and 7b, close enough to the Delaware River. As of Census 2010, the racial makeup of the township was 90.0% White, 5.7% African American, 0.1% Native American, 2.2% Asian, 0.5% from other races, and 1.4% from two or more races. Hispanic or Latino of any race were 1.9% of the population . As of the census of 2000, there were 30,791 people, 12,121 households, and 8,218 families residing in the township.