| Mason, TN (Town) |
| Mason, TX (City) |
| Mason, WV (Town) |
| Mason, MI (City) |
| Mason, OH (City) |
| Mason, IL (Town) |
| Mason, MN (Township) |
| Mason City, IL (City) |
| Mason City, IA (City) |
| Mason City, NE (Village) |
| Mason City Township, IL (Township) |
| Mason County, IL (County) |
| Mason County, TX (County) |
| Mason County, KY (County) |
| Mason County, WV (County) |
