| Zipcode | Community | City | State | Metro Area |
|---|---|---|---|---|
| 04469 | Orono | Orono | Maine | Bangor ME |
| 04473 | Orono | Orono | Maine | Bangor ME |
| 17980 | Orwin | Tower city | Pennsylvania | Pottsville PA |
| 28369 | Orrum | Orrum | North Carolina | Lumberton NC |
| 28640 | Orion | Jefferson | North Carolina | |
| 37380 | Orme | South pittsburg | Tennessee | Chattanooga TN-GA |
| 48359 | Orion | Lake orion | Michigan | Detroit-Warren-Dearborn MI |
| 48360 | Orion | Lake orion | Michigan | Detroit-Warren-Dearborn MI |
| 48362 | Orion | Lake orion | Michigan | Detroit-Warren-Dearborn MI |
| 50664 | Oran | Oran | Iowa | |
| 58368 | Orrin | Rugby | North Dakota | |
| 61273 | Orion | Orion | Illinois | Davenport-Moline-Rock Island IA-IL |
| 62554 | Oreana | Oreana | Illinois | Decatur IL |
| 63771 | Oran | Oran | Missouri | Sikeston MO |
| 72132 | Orion | Redfield | Arkansas | Pine Bluff AR |
| 82633 | Orin | Douglas | Wyoming | |
| 83650 | Oreana | Murphy | Idaho | Boise City ID |
| 89419 | Oreana | Lovelock | Nevada | |