The Census Bureau is part of the U.S. Department of Commerce. The U.S. census counts every resident in the United States. The count is mandated by Article I, Section 2 of the Constitution and takes place every 10 years. Please find below a link to the U.S. Census Bureau’s QuickFacts page for Clay County, Florida:
https://www.census.gov/quickfacts/fact/table/claycountyflorida/PST045216