The Niagara Falls Citizens were a minor league baseball club, based in Niagara Falls, New York. The franchise can be traced back to 1939 when the Niagara Falls Rainbows were established and played as a charter member of the Pennsylvania–Ontario–New York League. The team was affiliated with the Cleveland Indians in 1939. However, on July 13, 1940, the team relocated to Jamestown, New York to become the Jamestown Falcons. Each of the Niagara Falls teams played their home games at Sal Maglie Stadium.