Kansas City Population 2025 Forecast 2025. Kansas city is a city in missouri, state of united states, kansas city, mo population in 2025 is estimated to be 516,037, covers city area of 318.80 sq mi (825.69 sq km), largest city in. Current weather forecast for kansas city, ks.

The median age in kansas city is 35.4, compared to 38.8 nationwide, according to the american community survey 2017. Ever wonder how many people live in kansas city, mo and how fast that number changes?