About 155,000 people.

Kansas City, Kansas sits right on the border with Missouri and is a busy, lively place. People often call it KCK to keep it separate from the Missouri side.
You can cheer at a Sporting KC soccer game, ride roller coasters at a nearby amusement park, or shop at the big Legends outdoor mall.
The city has a big soccer stadium and a speedway where fast race cars zoom around the track.
You can stand on the line where Kansas meets Missouri, so one city really touches two states.