The Pony League World Series is the flagship tournament of PONY Baseball and Softball. After the creation of the organization in 1951, there were already 505 teams across 106 leagues the following year. This prompted PONY to create the Pony League World Series in Washington County, Pennsylvania. The finals did not have a set location and took place in various states, including California, Nebraska, Texas, Illinois, Iowa, and Washington. In 1981, World Series Tournaments, Incorporated (WSTI) was put in charge of running the tournament and fixed the location to Washington County, Pennsylvania.