Welcome to Upper Merion Township, one of the most vibrant centers of business and recreation in Pennsylvania. Upper Merion is a township in Montgomery County, roughly 17 square miles large and located in southeastern Pennsylvania, approximately 15 miles from Philadelphia. It is home to over 28,000 residents, hosts over 50,000 jobs, and offers over 9.5 million square feet of office space. It also contains Valley Forge National Historical Park, visited by over 1.2 million people per year, and the King of Prussia Mall, which is the nation’s largest shopping mall in terms of square footage of retail space.