| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| O'Banion Mobile Home Park | city | Arizona | United States | 33.37 | -110.76 | 4189 | |
| Oak Creek | city | Arizona | United States | 34.78 | -111.76 | 4189 | |
| Oak Creek Mobilodge | city | Arizona | United States | 34.85 | -111.77 | 4350 | |
| Oak Grove | city | Arizona | United States | 36.15 | -113.58 | 5921 | |
| Oak Knoll Village | city | Arizona | United States | 34.52 | -112.44 | 6128 | |
| Oak Park Mobile Home Park | city | Arizona | United States | 34.26 | -111.32 | 5029 | |
| Oak Springs | city | Arizona | United States | 35.48 | -109.13 | 6797 | |
| Oak Wells | city | Arizona | United States | 32.79 | -110.94 | 4540 | |
| Oakhurst | city | Arizona | United States | 33.64 | -111.95 | 1669 | |
| Oasis Junction Mobile Home Park | city | Arizona | United States | 33.42 | -111.57 | 1679 | |
| Oatman | city | Arizona | United States | 35.03 | -114.38 | 2687 | |
| Ocapos (historical) | city | Arizona | United States | 33.00 | -112.52 | 1669 | |
| Ocotillo | city | Arizona | United States | 34.36 | -112.20 | 4199 | |
| Ocotillo | city | Arizona | United States | 33.24 | -111.86 | 1197 | |
| Octave | city | Arizona | United States | 34.14 | -112.69 | 3572 | |
| Oit Ihuk | city | Arizona | United States | 32.32 | -112.25 | 2509 | |
| Olberg | city | Arizona | United States | 33.09 | -111.69 | 1669 | |
| Old Columbine | city | Arizona | United States | 32.71 | -109.91 | 9570 | |
| Old Glory | city | Arizona | United States | 31.43 | -111.25 | 4189 | |
| Old Leupp | city | Arizona | United States | 35.28 | -110.97 | 5029 | |
| Old Shongopavi (historical) | city | Arizona | United States | 35.80 | -110.52 | 5869 | |
| Old Tucson | city | Arizona | United States | 32.22 | -111.13 | 2660 | |
| Old Tucson Estates | city | Arizona | United States | 32.19 | -111.10 | 2601 | |
| Olga | city | Arizona | United States | 32.30 | -109.36 | 3628 | |
| Olive City (historical) | city | Arizona | United States | 33.61 | -114.53 | 285 | |
| Olive West | city | Arizona | United States | 33.57 | -112.22 | 1148 | |
| One Mile | city | Arizona | United States | 36.80 | -112.05 | 6003 | |
| Oracle | city | Arizona | United States | 32.61 | -110.77 | 4599 | |
| Oracle Foothills Estates | city | Arizona | United States | 32.30 | -110.95 | 2509 | |
| Oracle Junction | city | Arizona | United States | 32.56 | -110.93 | 3389 | |
| Oraibi | city | Arizona | United States | 35.88 | -110.64 | 5971 | |
| Orange Grove Estates | city | Arizona | United States | 32.32 | -111.04 | 2509 | |
| Orange Grove Estates Mobile Home Park | city | Arizona | United States | 33.56 | -112.20 | 1145 | |
| Orange Grove Mobile Estates | city | Arizona | United States | 32.32 | -111.04 | 2509 | |
| Orangetree | city | Arizona | United States | 33.34 | -111.90 | 1181 | |
| Orangetree Estates | city | Arizona | United States | 33.59 | -111.96 | 1669 | |
| Orangewood Village Mobilehome Park | city | Arizona | United States | 33.66 | -112.12 | 1669 | |
| Orchard Valley Mobile Home Park | city | Arizona | United States | 32.49 | -110.91 | 3349 | |
| Oregon Trail Mobile Home Park | city | Arizona | United States | 33.56 | -112.12 | 1197 | |
| Oro Blanco | city | Arizona | United States | 31.50 | -111.28 | 4189 | |
| Oro Valley | city | Arizona | United States | 32.39 | -110.97 | 2601 | |
| Otero | city | Arizona | United States | 31.53 | -111.01 | 3366 | |
| Out West Trailer Park | city | Arizona | United States | 33.45 | -112.13 | 1112 | |
| Overgaard | city | Arizona | United States | 34.39 | -110.55 | 6709 | |
| Overland Trail | city | Arizona | United States | 33.66 | -112.16 | 1669 | |
| Owl | city | Arizona | United States | 32.72 | -113.79 | 830 | |
| Oxbow Estates | city | Arizona | United States | 34.18 | -111.34 | 5029 | |
| Oxbow Estates Mobile Home Park | city | Arizona | United States | 34.26 | -111.26 | 5029 |