Sellersville was founded in the early 18th century. It was centered on a major road known as Bethlehem Pike that connected Philadelphia to Bethlehem and the rest of what was then far Western Pennsylvania. The town was very small and was called Sellers Tavern. Its most notable feature was a large inn. The present Washington House in Sellersville, however, was not Sellers Tavern. The town grew slowly over the years until the Industrial Revolution. In the 1860s the North Pennsylvania Railroad was built, running parallel to Bethlehem Pike: this stimulated the growth of light textile industries and brought a wave of population growth. The East Branch of the Perkiomen Creek runs through the town which connects it to an adjacent town of Perkasie. This creek was dammed in the early 20th century creating a small body of water known as Lake Lenape. Along the length of the lake a park was built on Perkasie and Sellersville lands. In the 1920s and 1930s this park housed a carousel, a roller coaster and several other amusements. The railroad brought hundreds of people from Philadelphia in the summer time, and it became a well known vacation spot for blue collar city workers.