1850 Atlas
| Name | What | Place | Pop | Other |
| Reform | PO | Pickens Co, AL | ||
| Reform | PO | Union Co, AR | ||
| Refugio | PO | Refugio Co, TX | (seat of justice) | |
| Regnier's Mills | PO | Aurelius twp, Washington Co, OH | ||
| Rehoboth | PT | Bristol Co, MA | 2,104 | water by Palmer's river |
| Rehoboth | PV | Lunenburgh Co, VA | ||
| Rehoboth | PV | Edgefield dist, SC | ||
| Rehoboth | PV | Wilkes Co, GA | ||
| Rehoboth | PV | Perry Co, OH | ||
| Rehersburgh | PV | Tulpehocken twp, Berks Co, PA | ||
| Reidsburgh | PV | Clarion Co, PA | ||
| Reidsville | PV, CH | Tatnall Co, GA | seat of justice, water by Great Ohoopee river | |
| Reidsville | PO | Bern twp, Albany Co, NY | ||
| Reidsville | PV | Rockingham Co, NC | ||
| Reily | PO | Butler Co, OH | ||
| Reindeer | PO | Nodaway Co, MO | ||
| Reinholdsville | PV | Lancaster Co, PA | ||
| Reistertown | PV | Baltimore Co, MD | ||
| Relfe | PO | Pulaski Co, MO | ||
| Relf's Bluff | PO | Drew Co, AR | ||
| Remington | PO | Alleghany Co, PA | ||
| Remsen | PT | Oneida Co, NY | 2,407 | water by Black river |
| Renick's Mills | PO | Lafayette Co, MO | ||
| Renrock | PO | Morgan Co, OH | ||
| Rensselaer | V | Sand Lake twp, Rensselaer Co, NY | ||
| Rensselaer | PV, CH | Jasper Co, IN | seat of justice, water by Iroquois river | |
| Rensselaer | T | Wayne Co, MI | ||
| Rensselaerville | PT | Albany Co, NY | 3,929 | water by Catskill & Foxes creeks |
| Repton | PO | Clarke Co, IN | ||
| Republic | PO | Scipio twp, Seneca Co, OH | ||
| Republic | PO | Surry Co, NC | ||
| Republican | PO | German twp, Darke Co, OH | ||
| Republican | PT | Jefferson Co, IN | 1,528 | |
| Republican | PO | Columbia Co, GA | ||
| Republican Grove | PO | Halifax Co, VA | ||
| Republican Grove | PO | De Kalb Co, TN | ||
| Republican Mills | PO | Fairfax Co, VA | ||
| Resaca | PO | Murray Co, GA | ||
| Reserve | T | Alleghany Co, PA | 1,160 | |
| Reserve | PO | Miami Co, IN | ||
| Reserve | PO | St Joseph Co, MI | ||
| Retreat | PO | Franklin Co, VA | ||
| Retreat | PO | Grimes Co, TX | ||
| Revilee | PO | Scott Co, AR | ||
| Rexford Flats | PO | Clifton Park twp, Saratoga Co, NY | ||
| Reynale's Basin | PO | Niagara Co, NY | ||
| Reynolds | PO | Houston Co, GA | ||
| Reynoldsburgh | PV | Truro twp, Franklin Co, OH | water by Black Lick creek | |
| Reynoldsburgh | V | Humphrey Co, TN | water by Tennessee river | |
| Reynoldsville | PV | Hector twp, Tompkins Co, NY | ||
| Reynoldsville | PO | Jefferson Co, PA | ||
| Reynosa | PO | Laurens dist, SC | ||
| Rheatown | PV | Greene Co, TN | ||
| Rhinebeck | PT | Dutchess Co, NY | 2,816 | water by Hudson river & Landtman's creek |
| Rhinebeck Landing | V | Rhinebeck twp, Dutchess Co, NY | on the Hudson river opposite Kingston Point | |
| Rhoads Point | PO | Macoupin Co, IL | ||
| Riblet's | PO | Richland Co, OH | ||
| Rice | PO | Cattaraugus Co, NY | ||
| Rice | T | Sandusky Co, OH | 483 | |
| Riceborough | PV, CH | Liberty Co, GA | seat of justice, water by Newport river | |
| Rice City | PV | Coventry twp, Kent Co, RI | ||
| Rice Creek | PO | Calhoun Co, MI | ||
| Rice's Landing | PO | Greene Co, PA | ||
| Rice's Store | PO | Westmoreland Co, VA | ||
| Riceville | PO | Hancock Co, MS | ||
| Riceville | PO | Monmouth Co, NJ | ||
| Riceville | PO | Crawford Co, PA | ||
| Riceville | PO | Pittsylvania Co, VA | ||
| Rich Creek | PO | Logan Co, VA | ||
| Rich Fork | PO | Davidson Co, NC | ||
| Rich Hill | PT | Greene Co, PA | ||
| Rich Hill | PT | Muskingum Co, OH | 1,495 | |
| Rich Hill | PO | Maury Co, TN | ||
| Rich Patch | PO | Alleghany Co, VA | ||
| Rich Square | PO | Northampton Co, NC | ||
| Rich Valley | PO | Bedford Co, TN | ||
| Rich Valley | PO | Wythe Co, VA | ||
| Rich Woods | PO | Izard Co, AR | ||
| Rich Woods | PO | Delaware Co, IN | ||
| Rich Woods | PT | Washington Co, ME | 829 | |
| Rich Woods | T | Miller Co, MO | ||
| Richardson | PO | Vermilion Co, IL | ||
| Richardson's | PO | Montgomery Co, TN | ||
| Richardson's Creek | PO | Union Co, NC | ||
| Richardsonville | PV | Edgefield dist, SC | ||
| Richardsville | PV | Culpepper Co, VA | ||
| Richardsville | PO | Jefferson Co, PA | ||
| Richborough | PV | Bucks Co, PA | ||
| Richburgh | PO | Wirt twp, Alleghany Co, NY | ||
| Richfield | PT | Otsego Co, NY | 1,502 | water by Canaderaga lake |
| Richfield | PO | Juniata Co, PA | ||
| Richfield | PO | Adams Co, IL | ||
| Richfield | PT | Summit Co, OH | 1,268 | |
| Richfield | T | Henry Co, OH | 136 | |
| Richfield | T | Huron Co, OH | 1,944 | |
| Richfield | T | Lucas Co, OH | 399 | |
| Richfield | PT | Genesee Co, MI | 482 | |
| Richfield Springs | PV | Richfield twp, Otsego Co, NY | near a celebrated sulphur spring | |
| Richford | PT | Franklin Co, VT | 1,074 | water by Missisque river |
| Richford | PT | Tioga Co, NY | 1,208 | water by East & West Oswego creeks |
| Richland | PT, CH | Oswego Co, NY | 4,079 | seat of justice with Oswego, water by Salmon river & Lake Ontario. County buildings are in village of Pulaski |
| Richland | T | Venango Co, PA | 1,008 | |
| Richland | T | Bucks Co, PA | 1,734 | water by Tochickon creek |
| Richland | T | Cambria Co, PA | 1,942 | |
| Richland | T | Richland Co, OH | ||
| Richland | T | Belmont Co, OH | 3,351 | |
| Richland | T | Clinton Co, OH | 1,975 | |
| Richland | T | Darke Co, OH | 798 | |
| Richland | T | Defiance Co, OH | 1,218 | |
| Richland | T | Guernsey Co, OH | 1,438 | |
| Richland | T | Hancock Co, OH | ||
| Richland | T | Henry Co, OH | 136 | |
| Richland | T | Holmes Co, OH | 1,349 | |
| Richland | T | Logan Co, OH | 1,169 | |
| Richland | T | Marion Co, OH | 1,229 | |
| Richland | T | Miami Co, IN | ||
| Richland | T | Allen Co, OH | 989 | |
| Richland | T | Madison Co, AR | 736 | |
| Richland | T | Phillips Co, AR | 851 | |
| Richland | T | Washington Co, AR | 489 | |
| Richland | PV | Giles Co, TN | ||
| Richland | PV | Holmes Co, MA | ||
| Richland | PV | Stewart Co, GA | ||
| Richland | PT | Jefferson Co, AR | 1,124 | |
| Richland | PT | Kalamazoo Co, MI | 795 | |
| Richland | PT | Fountain Co, IN | 1,725 | |
| Richland | PV | Rush Co, IN | ||
| Richland | T | Steuben Co, IN | 393 | |
| Richland | PV | Sangamon Co, IL | ||
| Richland | PO | Greene Co, MO | ||
| Richland | PT | Morgan Co, MO | ||
| Richland | T | Scott Co, MO | ||
| Richland | PO | Keokuk Co, IA | ||
| Richland | PO | Tazewell Co, VA | ||
| Richland Centre | PO | De Kalb Co, IN | ||
| Richland City | PO | Richland Co, WI | ||
| Richland Crossings | PO | Navarro Co, TX | ||
| Richland Grove | PO | Mercer Co, IL | ||
| Richlands | PO | Onslow Co, NC | ||
| Richlandtown | PV | Bucks Co, PA |