| Bay County, FL (County) |
| Bay Creek Community Development District, FL (CDD) |
| Bay De Noc Township, MI (Township) |
| Bay Harbor Islands , FL (Town) |
| Bay Head, NJ (Borough) |
| Bay Lake, FL (City) |
| Bay Lake, MN (Township) |
| Bay Laurel Center Community Development District, FL (CDD) |
| Bay Mills Township, MI (Township) |
| Bay Minette, AL (City) |
| Bay Springs, MS (City) |
| Bay St Louis, MS (City) |
| Bay Township, OH (Township) |
| Bay Township, MI (Township) |
| Bay View, OH (Village) |
