Why do you think they call them counties?
Top 20 most visited counties by our users Cook, IL Washington, DC Fairfax, VA Orange, FL Los Angeles, CA Denver, CO New York, NY Fulton, GA Prince George's, MD Arlington, VA Baltimore, MD City of Baltimore, MD Clark, NV St.
List of counties by U.S. state and territory - Wikipedia
The following is a list of the 3,143 counties and county-equivalents in the 50 states and District of Columbia sorted by U.S. state, plus an additional 100 county-equivalents in the U.S. territories sorted by territory. The State of Alabama comprises 67 counties.