| Isbel, KS (Township) |
| Ischua, NY (Town) |
| Ishpeming, MI (City) |
| Ishpeming Township, MI (Township) |
| Islamorada, Village of Islands , FL (Village) |
| Island, KY (City) |
| Island City, OR (City) |
| Island County, WA (County) |
| Island Creek Township, OH (Township) |
| Island Falls, ME (Town) |
| Island Grove, NE (Township) |
| Island Grove Township, IL (Township) |
| Island Heights, NJ (Borough) |
| Island Lake, IL (Village) |
| Island Lake, MN (Township) |
