Flushing is a city in Genesee County, Michigan, United States. The population was 8,411 at the 2020 census. Flushing is considered a suburb of Flint. It is situated within the survey area of Flushing Charter Township, but is administratively autonomous. Flushing originated as a mill town in the mid-1830s. Its location along the Flint River, the county's largest river, was a decisive factor in its settlement.