Category:Built in Ohio in 1791
- States of the United States
- California
- Delaware
- Kentucky
- Louisiana
- Maryland
- Massachusetts
- New Jersey
- North Carolina
- Ohio
- Pennsylvania
- Rhode Island
- Tennessee
- Virginia
- District of Columbia
- Washington, D.C.
- Insular areas
- Minor Outlying Islands
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Subcategories
This category has the following 2 subcategories, out of 2 total.
F
- Fort Hamilton (Ohio) (1 F)
- Fort Jefferson (Ohio) (4 F)