Downingtown High School is a secondary school located in Downingtown, Pennsylvania and Uwchlan Township, Pennsylvania. Population growth in the burgeoning Downingtown Area School District forced the original Downingtown High School to split into two campuses: Downingtown High School East Campus and Downingtown High School West Campus. While still legally considered one school, the two campuses (usually referred to simply as "East" or "West") are generally regarded as separate entities. While the West Campus is located on the original high school's campus within Downingtown, the East Campus is actually located in Lionville, the northern side of Exton, Pennsylvania.The mascot for Downingtown East is the cougar, for Downingtown West, the whippet. Both schools' colors are blue and gold, a similarity that recalls that the two campuses were once one school. A healthy rivalry exists between Downingtown East and West. Both schools are well known for their athletics and have won many titles for all different sports. Downingtown High School is well known for having the nation's oldest high school alumni association (est. 1884).