O
- Oak Grove
- Oasis
- Oasis
- Obar
- Ocate
- Ochoa
- Oil Center
- Ojito
- Ojito
- Ojitos Frios
- Ojo Amarillo
- Ojo Caliente
- Ojo Encino
- Ojo Feliz
- Ojo Sarco
- Old Campbell Place
- Old Hachita
- Old Horner Place
- Old Horse Springs
- Old Isaacs Place
- Old Longbotbam Place
- Old Town
- Old Waterman Place
- Old Wright Place
- Olive
- Omega
- Onava
- O'Neil Landing
- Optimo
- Orange
- Orchard Park
- Orchard Place
- Organ
- Orogrande
- Oscura
- Otis
- Otowi
- Otto