Lower Merion Township is a township in Montgomery County, Pennsylvania and part of the Philadelphia Main Line. As of the 2016 U.S. Census, the township had a total population of 58,288. Lower Merion has the 5th highest per-capita income and the 12th highest median household income in the country with a population of 50,000 or more.
The name Merion originates with the county of Merioneth in north Wales. Merioneth is an English-language transcription of the Welsh Meirionnydd.
Lower Merion is one of the major inner ring suburbs of Philadelphia, along with Upper Darby, Haverford, and Cheltenham.