| Code | Name | Region |
|---|---|---|
| USRY6 | Ray | ND |
| USRJX | Ray | OH |
| USYDT | Ray City | GA |
| USR3Y | Rayle | GA |
| USAYM | Raymond | CA |
| USR4Y | Raymond | GA |
| USYOD | Raymond | ME |
| USRMB | Raymond | MN |
| USUYG | Raymond | MS |
| USRND | Raymond | MT |
| USRYO | Raymond | NH |
| USRM3 | Raymond | OH |
| USACC | Raymond | WA |
| USRM2 | Raymond | WI |
| USRAS | Ranson | WV |
| USRNL | Rantoul | IL |
| USRTU | Rantoul | KS |
| USIYI | Rapid City | MI |
| USRAP | Rapid City | SD |
| USYRP | Rapidan | VA |
| USRAT | Raritan | NJ |
| USRSP | Raspberry Strait | AK |
| USRHU | Rathdrum | ID |
| USRTY | Ratliff City | OK |
| USRAN | Raton | NM |
| USRFA | Rattan | OK |
| USRN8 | Raven | VA |
| USXRA | Ravena | NY |
| USRA4 | Ravenden Springs | AR |
| USRV7 | Ravenel | SC |
| USR8K | Ravenna | KY |
| USR8V | Ravenna | MI |
| USRVD | Ravenna | NE |
| USRVN | Ravenna | OH |
| USDCP | Randolph | MO |
| USRLP | Randolph | MS |
| USDOP | Randolph | NE |
| US8RA | Randolph | NH |
| USRDP | Randolph | NJ |
| USRJD | Randolph | NY |
| USOL9 | Randolph | OH |
| USRPZ | Randolph | VT |
| USRNP | Randolph | WI |
| USTXH | Randolph Center | VT |
| USRLK | Random Lake | WI |
| USRGY | Rangeley | ME |
| USRNG | Rangely | CO |
| USJGR | Ranger | GA |
| USRGR | Ranger | TX |
| USIFR | Ranier | MN |