[3][4] An Indian mission was established in 1829 at the town's site, hence the name of the later settlement.

[7] The 2020 United States census counted 9,954 people, 5,295 households, and 2,240 families in Mission.

46.2% of households consisted of individuals and 12.9% had someone living alone who was 65 years of age or older.

46.8% of all households were made up of individuals, and 10% had someone living alone who was 65 years of age or older.

45.6% of all households were made up of individuals, and 8.5% had someone living alone who was 65 years of age or older.

Shawnee is considerably larger than Mission and the postal name of Shawnee Mission applies to a far larger area and population than the combined total of just those two incorporated cities.

The postal address of Seaboard's offices is "Shawnee Mission".

Radio station clusters owned by Cumulus Media and Entercom have their studios in Mission.

The City of Mission offers several assistance programs to help residents maintain the exteriors of their homes.

These programs include Mission Possible, an effort to help elderly and disabled individuals remove dilapidated structures, physical barriers, and make basic repairs to their homes and property.

The city also provides free paint and primer to low income residents to maintain the aesthetics of their homes.

[22] Mission is a member of the national Mayors Climate Protection Agreement, an effort encouraging cities to reduce greenhouse emissions.