Cleveland is a city in the Northeast of the Ohio region of Earth's North American continent. Ohio was part of the United States of America.
Cleveland was the home of the baseball team known as the Cleveland Indians. (TNG: "The Big Goodbye")
In another simulation of Dixon Hill, Guinan claimed to be Hill's cousin Gloria, and indicated that she was from Cleveland. (TNG: "Clues")
In 1947, Nog claimed that his race was going to invade Cleveland to his captors at Roswell. (DS9: "Little Green Men")
Cleveland is also near the site of Kent State University. Captain Janeway and Lt. B'Elanna Torres consulted a study regarding antimatter from Kent State. (VOY: "Deadlock")