Crittenden County is a county in the U.S. state of Kentucky. At the 2010 census, the population was 9,315. Its county seat is Marion. The county was formed in 1842 and named for John J. Crittenden, senator and future Governor of Kentucky. It is a prohibition or dry county.

Area: 371 mi²

Founded: 1842

Population: 8,947 (2021)

County seat: Marion

Cities: Marion, Dycusburg, Tolu, Crayne