| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Obrajia | city | Region de Tarapaca | Chile | -18.83 | -69.78 | 6141 | 0 |
| Ocacucho | city | Region de Tarapaca | Chile | -19.80 | -68.73 | 14419 | 0 |
| Ocharaza | city | Region de Tarapaca | Chile | -19.88 | -69.43 | 6702 | 0 |
| Oficina Adriatico | city | Region de Tarapaca | Chile | -20.40 | -69.93 | 3917 | 149 |
| Oficina Argentina | city | Region de Tarapaca | Chile | -20.45 | -69.88 | 3379 | 149 |
| Oficina Aurrera | city | Region de Tarapaca | Chile | -20.63 | -69.63 | 3323 | 149 |
| Oficina Bellavista | city | Region de Tarapaca | Chile | -20.82 | -69.72 | 2995 | 149 |
| Oficina Buen Retiro | city | Region de Tarapaca | Chile | -20.23 | -69.82 | 3523 | 149 |
| Oficina Buenaventura | city | Region de Tarapaca | Chile | -20.83 | -69.73 | 3195 | 149 |
| Oficina Carmen Bajo | city | Region de Tarapaca | Chile | -20.28 | -69.80 | 3490 | 149 |
| Oficina Cholita | city | Region de Tarapaca | Chile | -20.37 | -69.90 | 3553 | 149 |
| Oficina Constancia | city | Region de Tarapaca | Chile | -20.02 | -69.78 | 3763 | 11 |
| Oficina Coruña | city | Region de Tarapaca | Chile | -20.48 | -69.88 | 3435 | 149 |
| Oficina Diana | city | Region de Tarapaca | Chile | -20.47 | -69.77 | 3280 | 149 |
| Oficina Dolores | city | Region de Tarapaca | Chile | -19.67 | -69.95 | 3641 | 0 |
| Oficina Eslavonia | city | Region de Tarapaca | Chile | -20.85 | -69.73 | 3254 | 149 |
| Oficina Felisa | city | Region de Tarapaca | Chile | -20.50 | -69.90 | 3789 | 149 |
| Oficina Humberstone | city | Region de Tarapaca | Chile | -20.20 | -69.80 | 3569 | 149 |
| Oficina Iris | city | Region de Tarapaca | Chile | -20.92 | -69.65 | 3126 | 149 |
| Oficina Kerima | city | Region de Tarapaca | Chile | -20.17 | -69.82 | 3667 | 149 |
| Oficina La Granja | city | Region de Tarapaca | Chile | -20.90 | -69.62 | 2903 | 149 |
| Oficina La Tirana | city | Region de Tarapaca | Chile | -20.35 | -69.67 | 3320 | 149 |
| Oficina Limena | city | Region de Tarapaca | Chile | -20.37 | -69.90 | 3553 | 149 |
| Oficina Norte Lagunas | city | Region de Tarapaca | Chile | -20.97 | -69.68 | 2837 | 149 |
| Oficina Paposo | city | Region de Tarapaca | Chile | -20.35 | -69.87 | 3500 | 149 |
| Oficina Pena Grande | city | Region de Tarapaca | Chile | -20.12 | -69.78 | 3733 | 148 |
| Oficina Peña Chica | city | Region de Tarapaca | Chile | -20.18 | -69.80 | 3484 | 149 |
| Oficina Ramírez | city | Region de Tarapaca | Chile | -20.05 | -69.77 | 3667 | 47 |
| Oficina Resurreccion | city | Region de Tarapaca | Chile | -20.48 | -70.00 | 3248 | 149 |
| Oficina Sacramento | city | Region de Tarapaca | Chile | -20.42 | -69.83 | 3733 | 149 |
| Oficina San Andres | city | Region de Tarapaca | Chile | -20.28 | -69.78 | 3382 | 149 |
| Oficina San Antonio | city | Region de Tarapaca | Chile | -20.42 | -69.90 | 3727 | 149 |
| Oficina San Donato | city | Region de Tarapaca | Chile | -20.10 | -69.77 | 3648 | 126 |
| Oficina San Esteban | city | Region de Tarapaca | Chile | -20.32 | -69.75 | 3330 | 149 |
| Oficina San Pablo | city | Region de Tarapaca | Chile | -20.45 | -69.87 | 3658 | 149 |
| Oficina San Pedro | city | Region de Tarapaca | Chile | -20.42 | -69.90 | 3727 | 149 |
| Oficina San Remigio | city | Region de Tarapaca | Chile | -20.50 | -69.90 | 3789 | 149 |
| Oficina Sara | city | Region de Tarapaca | Chile | -20.33 | -69.77 | 3366 | 149 |
| Oficina Sebastopol | city | Region de Tarapaca | Chile | -20.38 | -69.92 | 4061 | 149 |
| Oficina Serena | city | Region de Tarapaca | Chile | -20.30 | -69.78 | 3444 | 149 |
| Oficina Slavonia | city | Region de Tarapaca | Chile | -20.85 | -69.73 | 3254 | 149 |
| Oficina Victoria | city | Region de Tarapaca | Chile | -20.73 | -69.65 | 3064 | 149 |
| Oficina Virginia | city | Region de Tarapaca | Chile | -20.48 | -69.80 | 3244 | 149 |
| Ofragia | city | Region de Tarapaca | Chile | -18.83 | -69.78 | 6141 | 0 |
| Ofrajia | city | Region de Tarapaca | Chile | -18.83 | -69.78 | 6141 | 0 |
| Olivo | city | Region de Tarapaca | Chile | -19.30 | -69.40 | 8566 | 0 |
| Olivos | city | Region de Tarapaca | Chile | -19.30 | -69.40 | 8566 | 0 |
| Ossa | city | Region de Tarapaca | Chile | -18.28 | -69.85 | 8694 | 447 |