Bryn Mawr (pronounced ; from Welsh for "great hill") is a census-designated place (CDP) in Radnor Township, Delaware County, Pennsylvania, Haverford Township, Delaware County, Pennsylvania and Lower Merion Township, Montgomery County, Pennsylvania, just west of Philadelphia along Lancaster Avenue (US-30) and the border with Delaware County. Bryn Mawr is located toward the center of what is known as the Main Line, a group of affluent Philadelphia suburban villages stretching from the city limits to Malvern. As of the 2010 census, it had a population of 3,779. Bryn Mawr is home to Bryn Mawr College.