- Newlin, Chester County, Pennsylvania, United States1
- Newport, Newport County, Rhode Island, United States1
- Niagara Falls1
- Niagara, Niagara County, New York, United States1
- Noank, New London County, Connecticut, United States1
- Nolichucky River, Tennessee, United States1
- North Broadway, Saratoga County, New York, United States1
- North Carolina, United States1
- North Stafford, Connecticut, United States1
- Northumberland County, Pennsylvania, United States1
- Norway1
- Norwich, Hampshire County, Massachusetts, United States1
- Norwich, New London County, Connecticut, United States1
- Oban, Argyll and Bute, Scotland, United Kingdom1
- Ogdensburg, Franklin Mining District, Sussex County, New Jersey, United States1
- Ohio Drainage1
- Ohio River1
- Onondada Valley, Onondaga County, New York, United States1
- Onondaga County, New York, United States1
- Palermo, Sicily, Italy1