Upper Uwchlan Township is a township in Chester County, Pennsylvania, United States. The population was 11,227 at the 2010 census. The township included the community of Milford Mills before it was inundated by the creation of the Marsh Creek Dam in 1972.
The main population center of the township has grown surrounding the historic Eagle Tavern at the intersection of Route 100 and Little Conestoga Road. This major unincorporated community is known as the village of Eagle, but also sometimes known as Uwchland. That is the address of the local post office. Although the name "Uwchland" is the result of a spelling error made by the Postal Service in the 19th century when establishing the 19480 ZIP code, it has yet to be corrected. Much of the area surrounding the post office though is using the Chester Springs zip code of 19425.