Ohio

Ohio has long been a cultural and geographical crossroads in North America. Ohio is now in the East North Central States division. Ohio has the highest population density of any state outside of the Eastern Seaboard, and it is the seventh-largest U.S. state according to population. Ohio was the first state admitted to the Union under the Northwest Ordinance. Its U.S. postal abbreviation is OH; its old-style abbreviation was O. Natives of Ohio are known as Ohioans or Buckeyes, after the buckeye tree.