 st. johns is a city in the u.s. state of michigan. the population was 7,865 at the 2010 census. it is the county seat of clinton county. ==geography== according to the united states census bureau, the city has a total area of , all of it land.{{cite web|title=us gazetteer files 2010|url=http://www.census.gov/geo/www/gazetteer/file
Cities_in_Clinton_County,_Michigan Cities_in_Michigan County_seats_in_Michigan Lansing_a_East_Lansing_metropolitan_area