In the United States, a county is an administrative or political subdivision of a U.S. state that consists of a geographic region with specific boundaries and usually some level of governmental authority.
Most counties have subdivisions which may include townships, municipalities, and unincorporated areas.
Three counties were indirectly named for Jefferson: 21 counties and one parish in the United States are named after Andrew Jackson (1767–1845), the seventh president of the United States.
Two counties were indirectly named for Madison: 16 counties and one parish in the United States are named after Abraham Lincoln (1809–1865), the sixteenth president of the United States.
Seven other Lincoln counties exist in the United States; five of these counties are named for Benjamin Lincoln, a general in the American Revolutionary War.
Grant County, Wisconsin was named after an early pioneer who opened a trade with local Native Americans.
Adams County, North Dakota is named after the railroad agent John Quincy Adams, who was a distant cousin to his namesake president.
Cleveland County, North Carolina was named after Benjamin Cleveland, a colonel in the American Revolutionary War who took part in the Battle of King's Mountain.
Harding County, South Dakota was named after territorial legislator J.
Hayes County, Nebraska was named after Rutherford B. Hayes (1822–1893), the nineteenth president of the United States McKinley County, New Mexico was named after William McKinley (1843–1901), the twenty-fifth president of the United States.
The following 21 presidents do not have a county named after them: Andrew Johnson, Benjamin Harrison, William Howard Taft, Woodrow Wilson, Calvin Coolidge, Herbert Hoover, Franklin D. Roosevelt, Harry S. Truman, Dwight D. Eisenhower, John F. Kennedy, Lyndon B. Johnson, Richard Nixon, Gerald R. Ford, Jimmy Carter, Ronald Reagan, George H. W. Bush, Bill Clinton, George W. Bush, Barack Obama, Donald Trump, and Joe Biden.
Cass County, Missouri was originally established as Van Buren County in honor of President Martin Van Buren.
It was renamed in 1861 for Alexander H. Stephens, the vice president of the Confederate States of America.
It existed from 1887 to 1893, when it became part of Finney County, Kansas.