A county of Indiana, United States. County seat: Bloomington.
A county of West Virginia, United States. County seat: Union.
A county of Arkansas, United States. County seat: Clarendon.
A county of Ohio, United States. County seat: Woodsfield.
A county of Missouri, United States. County seat: Paris.
A county of Kentucky, United States. County seat: Tompkinsville.
A county of Alabama, United States. County seat: Monroeville.
A county of Tennessee, United States. County seat: Madisonville.
A county of Florida, United States. County seat: Key West.
A county of Michigan, United States. County seat: Monroe.
A county of Iowa, United States. County seat: Albia.
A county of Mississippi, United States. County seat: Aberdeen.
A county of Georgia, United States. County seat: Forsyth.
A county of New York, United States. County seat: Rochester.
A county of Pennsylvania, United States. County seat: Stroudsburg.
A county of Illinois, United States. County seat: Waterloo.
A county of Wisconsin, United States. County seat: Sparta.
An unincorporated community in Clay Township, Pike County, Indiana.
The Soviet Union: the proper noun Union is the standard English translation of the proper noun Союз (Sojuz), and all-Union is the standard English translation of всесоюзный (vsesojuznyj).
A town in Knox County, Maine.
A city in Union County, Oregon.
A small town in Vernon County, Wisconsin.
A small town in Waupaca County, Wisconsin.
A former unincorporated community in Napa County, California.
A small town in Door County, Wisconsin.
A tiny city in Hardin County, Iowa.
A town in Greene County, Alabama.
An unincorporated community in Clark County, Missouri.
A city, the county seat of Union County, South Carolina.
A small town in Burnett County, Wisconsin.
An unincorporated community in the town of Lima, Grant County, Wisconsin.
A town and unincorporated community in Eau Claire County, Wisconsin.
A village and census-designated place in the town of Wakefield, Carroll County, New Hampshire.
A ghost town in Merced County, California.
A small town in Pierce County, Wisconsin.
A city in Montgomery County and Miami County, Ohio.
A hamlet in Madison County, New York.
A town and unincorporated community in Rock County, Wisconsin.
A village on the south cast of the island of Siargao, Surigao del Norte, Philippines.
A large number of townships in the United States, listed under Union Township.
A city, the county seat of Franklin County, Missouri.
A surname.
A home rule city in Boone County, Kentucky.
Those of the United States that did not secede at the time of the Civil War (of the United States of America).
A small town in Tolland County, Connecticut.
A small town, the county seat of Monroe County, West Virginia.
The Oxford Union (a debating society); not to be conflated with Oxford University Student Union (a students' union).
A town in Neshoba County and Newton County, Mississippi.
A barangay of Ubay, Bohol, Philippines.
A village in McHenry County, Illinois.
A village in Cass County, Nebraska.
An unincorporated community in Floyd County, Virginia.
A community in Central Elgin, Elgin County, Ontario, Canada.
A large town in Broome County, New York.
The 0-10-2 locomotive wheel arrangement.