3. King of Prussia, Pennsylvania
Location: King of Prussia, Pennslyvania
Total Retail Floor Area (In square feet): 2,651,631
Located in the Community of King of Prussia in Upper Merion Township, Montgomery County, Pennsylvania, the King of Prussia Mall is the largest shopping mall complex in the United States of America with a total GLA of 2,651,631 square feet (246,344.6 m2).
Initially, when the mall was first constructed back in 1963, it consists of two separate buildings. But the two buildings are now joined back together after a major expansion was completed in 2016 to create one mega shopping mall.