The United States is composed of 3,006 counties and 135 county equivalents, which include parishes in Louisiana, boroughs and census areas in Alaska, and independent cities. Each state has its own number of counties, ranging from the fewest (as in Delaware and Rhode Island) to the most (as in Texas and Georgia).
If you're looking for a complete list or specific information about any county, please specify, and I can provide details or direct you to a resource that will be helpful!