Wyandotte County is a county in the U.S. state of Kansas. Its county seat and most populous city is Kansas City, with which it shares a unified government. As of the 2020 census, the population was 169,245, making it Kansas's fourth-most populous county. The county was named after the Wyandot tribe.

Children's Mercy Park is a soccer-specific stadium in Kansas City, Kansas, United States, and is the team home for Sporting Kansas City of Major League Soccer (MLS). The stadium is located near Kansas Speedway, on the far west side of Wyandotte County, Kansas. It opened during the 2011 MLS season on June 9, 2011, with a match against the Chicago Fire. The stadium has a seating capacity of 18,467, which can expand to 25,000 for concerts. Most SKC games attract around 21,000 spectators because of different stadium modes. The stadium is Sporting Kansas City's third home venue; then known as the Kansas City Wizards, the team played in Arrowhead Stadium from 1996 to 2007 and CommunityAmerica Ballpark from 2008 to 2010. In 2013, the stadium hosted the MLS All-Star Game, the United States men's national soccer team, and the MLS Cup, and is the only stadium to host all three in the same year.