Palatka is a city in Putnam County, Florida, United States. The population was 10,558 at the 2010 census. It is the county seat of Putnam County. Palatka is the principal city of the Palatka Micropolitan Statistical Area, which is home to 72,893 residents. The city is also home to St. Johns River State College, St. Johns River Water Management District Headquarters, and Ravine Gardens State Park. The area is well known for its local festivals, most notably the Florida Azalea Festival and the Blue Crab Festival.