| New Castle, NY (Town) |
| New Castle, PA (City) |
| New Castle, CO (Town) |
| New Castle, VA (Town) |
| New Castle, IN (City) |
| New Castle, KY (City) |
| New Castle, DE (City) |
| New Castle, NH (Town) |
| New Castle County, DE (County) |
| New Castle Township, PA (Township) |
| New Castle Township, OH (Township) |
| New Centerville, PA (Borough) |
| New Chapel Hill, TX (City) |
| New Chester Town, WI (Town) |
| New Chicago, IN (Town) |
