Countryside was a half-mile-wide residential area in Johnson County, Kansas, USA, which was incorporated by its residents as a city on July 2, 1951, under Kansas Law. In a special election on December 3, 2002, residents voted to consolidate with the surrounding city of Mission, Kansas, in which the houses and streets had originally been built in the unincorporated Mission Township of Johnson County beginning in 1937. Countryside, as a city governmental entity, ceased to exist on January 15, 2003, however, the originally founded Countryside Homes Association, Inc. neighborhood remains active.