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- Naperville, Illinois – Joseph Naper
- Nashmead, California – J. Nash (first postmaster)
- Nashville, Tennessee – Francis Nash
- Neals Diggins, California – Sam Neal (founder)
- Nelson, California – A.D. Nelson (early settler)
- Nelson, New Hampshire – Viscount Horatio Nelson (British admiral and naval hero)
- New Franklin, Missouri and New Franklin, Ohio – Benjamin Franklin
- New Marlborough, Massachusetts – John Churchill, Duke of Marlborough (indirectly, via Marlborough, Massachusetts)
- New Orleans, Louisiana – Philippe II, Duke of Orléans
- New Port Richey, Florida – Captain Aaron M. Richey
- New York City, New York – James of York and Albany
- Newbert, California – Leander Newbert (first postmaster)
- Newcastle, Maine – Thomas Pelham-Holles, 1st Duke of Newcastle-upon-Tyne
- Newell, California – Frederick Haynes Newell
- Newellton, Louisiana – Edward D. Newell
- Newfane, Vermont – John Fane, 7th Earl of Westmorland
- Newport, New Hampshire – Henry Newport (English soldier and statesman)
- Newton, Texas – John Newton (soldier of the American Revolutionary War)
- Nichols, California – William H. Nichols (landowner)
- Nick's Cove, California – Nick Kojich (restaurateur)
- Nickerson, Kansas – Thomas Nickerson (ATSF president)
- Nielsburg, California – Arthur C. Neill (first postmaster)
- Niles, Fremont, California – Addison Niles
- Norden, California – Charles Van Norden (water company official)
- Norman, Oklahoma – Abner E. Norman (surveyor)
- North Adams, Massachusetts – Samuel Adams (indirectly, via Adams, Massachusetts)
- North Cleveland, Texas – Charles Lander Cleveland (local judge) (indirectly, via Cleveland, Texas)
- North Fort Myers, Florida – Col. Abraham C. Myers
- Nortonville, California – Noah Norton (founder)
- Norwell, Massachusetts – Henry Norwell (dry goods merchant)
- Notleys Landing, California – Godfrey Notley (founder)
- Nottingham, New Hampshire – Daniel Finch, 2nd Earl of Nottingham
Read more about this topic: List Of American Places Named After People