Most Expensive Suburb in Pennsylvania: Radnor Township

Median home price: $512,600

Cost-of-living index: 324

Nonretail spending index: 328

Location: 19 miles northeast of Philadelphia

Population: 30,910


Located on Philadelphia's Main Line, Radnor Township hosts or is within a few miles of numerous nationally renowned institutions of higher education, including Villanova University, Bryn Mawr College, and Haverford College. (The term "Main Line" refers to the affluent towns that once were stops on the old Main Line of the Philadelphia Railroad.) It was settled by Quakers in the 1600s. Some of the country estates that still mark the area were subdivided for housing or, in the case of Villanova, converted into institutional or educational uses. Today, parks and golf courses dot the upscale town.