Gladwyne is a very affluent suburban community in Montgomery County, Pennsylvania, United States along the historic Philadelphia Main Line. In 2011, Gladwyne was ranked the 7th richest ZIP code in the country in a study by Bloomberg BusinessWeek. The population was 4,050 at the 2000 census. As Gladwyne is neither an incorporated area nor a census-designated place, all data are for the ZIP code 19035, with which the community is coterminous.There are four churches, a synagogue, a library, two schools, the Gladwyne fire company, the Gladwyne Civic Association, the Stony Lane Swim Club, playgrounds, parks, businesses, and retail shops within the confines of Gladwyne. The historic Guard House Inn is also located within Gladwyne. The village is also home to the Philadelphia Country Club on its periphery, Merion Cricket Club, and to The Courts, a private tennis club.