Williamsport is a city in and the county seat of Lycoming County, Pennsylvania in the United States. In 2009, the population was estimated at 29,304. It is the principal city of the Williamsport, Pennsylvania Metropolitan Statistical Area, which is included in the Williamsport-Lock Haven, Pennsylvania Combined Statistical Area.
Williamsport is known internationally as the birthplace of Little League Baseball. Neighboring South Williamsport is the headquarters of Little League Baseball and annually hosts the Little League World Series in late summer.
Williamsport was incorporated as a borough on March 1, 1806, and as a city on January 15, 1866. The city is the original home of Little League Baseball, founded in 1939 as a three-team league. The Little League World Series complex is currently based in South Williamsport and the Series itself is held in August.