| Code | Name | Region |
|---|---|---|
| USRVK | Russellville | KY |
| USRUE | Russellville | TN |
| USUSS | Russia | OH |
| USRSH | Russian Mission | AK |
| USRV3 | Russiaville | IN |
| UST5G | Rustburg | VA |
| USYRD | Runnemede | NJ |
| USRKX | Running Springs | CA |
| USRPT | Rupert | ID |
| US7RU | Rupert | VT |
| USRQH | Rural Hall | NC |
| USRRE | Rural Retreat | VA |
| USR5V | Rural Valley | PA |
| USRQY | Rush | KY |
| US5US | Rush | NY |
| USUEF | Rush Center | KS |
| USRHZ | Rush City | MN |
| USRHP | Rush Springs | OK |
| USRY4 | Rush Valley | UT |
| USRUF | Rushford | MN |
| USRU3 | Rushland | PA |
| USR5E | Rushville | IL |
| USRUH | Rushville | IN |
| USUKG | Rusk | TX |
| USRKN | Ruskin | FL |
| USROY | Royston | GA |
| USYRZ | Rozet | WY |
| USXUO | Rubidoux | CA |
| USRUB | Rubonia | FL |
| USRBY | Ruby | AK |
| USRUY | Ruby | SC |
| USRVU | Ruby Valley | NV |
| USRUK | Ruckersville | VA |
| USRDX | Rudyard | MI |
| USYRF | Ruffin | SC |
| USRFE | Ruffs Dale | PA |
| USUGG | Rugby | ND |
| USRUI | Ruidoso | NM |
| USRUL | Rule | TX |
| USRVI | Ruleville | MS |
| USRFM | Rumford | ME |
| USRFB | Rumford | RI |
| USRU8 | Rumney | NH |
| USYRJ | Rumsey | KY |
| USRUW | Rumson | NJ |
| USRWY | Rowley | UT |
| USRZM | Roxana | IL |
| USR8A | Roxana | KY |
| USRXB | Roxboro | NC |
| USRXQ | Roxbury | CT |