Wynnewood is a suburban unincorporated community, west of Philadelphia, that straddles Lower Merion Township, Montgomery County and Haverford Township, Delaware County, Pennsylvania, United States. It was named in 1691 for Dr. Thomas Wynne, William Penn's physician and the first Speaker of the Pennsylvania General Assembly. Lower Merion Township is the fifth-most-affluent jurisdiction in the United States. Wynnewood is one of many neighborhoods on the historic Pennsylvania Main Line, and is the home of institutions such as Lankenau Hospital, St. Charles Borromeo Seminary, Palmer Theological Seminary, and Friends' Central School.
Wynnewood is neither an incorporated area nor a census-designated place; all data is for its ZIP code 19096. As of 2010 Census, there were 13,572 people and 5,436 households residing in the community. In 2000, the population density was 3,882 people per square mile. The racial makeup of the community was 92.9% White, 3.2% Asian, 2.5% African American, 0.40% from other races, and 1.0% from two or more races.