| Zipcode | Community | City | State | Metro Area |
|---|---|---|---|---|
| 03864 | Ossipee | Ossipee | New Hampshire | |
| 04764 | Oxbow | Oxbow | Maine | |
| 13608 | Oxbow | Antwerp | New York | Watertown-Fort Drum NY |
| 13671 | Oxbow | Oxbow | New York | Watertown-Fort Drum NY |
| 27244 | Ossipee | Elon | North Carolina | Burlington NC |
| 34141 | Ochopee | Ochopee | Florida | Naples-Immokalee-Marco Island FL |
| 34972 | Okeechobee | Okeechobee | Florida | Okeechobee FL |
| 34973 | Okeechobee | Okeechobee | Florida | Okeechobee FL |
| 34974 | Okeechobee | Okeechobee | Florida | Okeechobee FL |
| 54862 | Ojibwa | Ojibwa | Wisconsin | |
| 58047 | Oxbow | Horace | North Dakota | Fargo ND-MN |
| 64118 | Oakview | Kansas city | Missouri | Kansas City MO-KS |
| 93022 | Oak view | Oak view | California | Oxnard-Thousand Oaks-Ventura CA |
| 97840 | Oxbow | Oxbow | Oregon | |
| 98339 | Oak bay | Port hadlock | Washington | |
|
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