Exposition Park was the name given to three historic stadiums, located in what is today Pittsburgh, Pennsylvania. The fields were used mainly for professional baseball and American football from c. 1879 to c. 1915. The ballparks were initially located on the north side of the Allegheny River in Allegheny City, Pennsylvania. The city was annexed into Pittsburgh in 1907, which became the city's North Side, located across from Pittsburgh's downtown area. Due to flooding from the nearby river, the three stadiums' exact locations varied somewhat. The final version of the ballpark was between the eventual sites of Three Rivers Stadium and PNC Park.

Allegheny City was a municipality that existed in the U.S. state of Pennsylvania from 1788 until it was annexed by Pittsburgh in 1907. It was located north across the Allegheny River from downtown Pittsburgh, with its southwest border formed by the Ohio River, and is known today as the North Side. The city's waterfront district, along the Allegheny and Ohio rivers, became Pittsburgh's North Shore neighborhood.