1850 Atlas
| Name | What | Place | Pop | Other |
| Prairie | T | Franklin Co, OH | 1,043 | water by Darby creek |
| Prairie | T | Arkansas Co, AR | ||
| Prairie | T | Holmes Co, OH | ||
| Prairie | T | Chariton Co, MO | ||
| Prairie | PT | Henry Co, IN | ||
| Prairie | T | Howard Co, IL | ||
| Prairie | T | Carroll Co, AR | ||
| Prairie | T | Washington Co, AR | ||
| Prairie | T | Franklin Co, AR | ||
| Prairie | T | Madison Co, AR | ||
| Prairie | T | Montgomery Co, MO | ||
| Prairie | PT | Lewis Co, MO | ||
| Prairie Bird | PO | Shelby Co, IL | ||
| Prairie Bluff | PO | Wilcox Co, AL | ||
| Prairie Creek | PO | Vigo Co, IN | ||
| Prairie Creek | PO | Logan Co, IL | ||
| Prairie Creek | PO | Yell Co, AR | ||
| Prairie de Long | PO | St Clair Co, IL | situated on Prairie de Long creek | |
| Prairie Du Chien | PV, CH | Crawford Co, WI | seat of justice, water by Mississippi river | |
| Prairie Du Rocher (Prairie du Rocher) | PV | Randolph Co, IL | water by Mississippi river | |
| Prairie Du Sauk | PV, CH | Sauk Co, WI | seat of justice, water by Wisconsin river | |
| Prairie Lea | PO | Caldwell Co, TX | ||
| Prairie Mer Rouge | PO | Morehouse parish, LA | ||
| Prairie Mount | PO | Chickasaw Co, MS | ||
| Prairie Plains | PO | Grimes Co, TX | ||
| Prairie Poin | PO | Noxubee Co, MS | ||
| Prairie Ridge | PO | White Co, IN | ||
| Prairie River | PO | Branch Co, MI | ||
| Prairie Ronde | PT | Kalamazoo Co, MI | 690 | |
| Prairieton | PV | Prairie twp, Vigo Co, IN | water by Prairie creek | |
| Prairieton | V | Lawrence Co, IL | ||
| Prairieville | T | Milwaukee Co, WI | ||
| Prairieville | PV | Clinton Co, IN | ||
| Prairieville | PO | Pike Co, MO | ||
| Prairieville | PO | Barry Co, MI | ||
| Prallsville | PV | Amwell twp, Hunterdon Co, NJ | water by Delaware river & Wickechecoke creek | |
| Pratt | PO | Shelby Co, OH | ||
| Prattsburgh | PT | Steuben Co, NY | 2,786 | water by Conhocton river |
| Prattsburgh | PV | Orange Co, NC | ||
| Prattsburgh | PV | Talbot Co, GA | ||
| Prattsburgh | PO | Ripley Co, IN | ||
| Pratt's Hollow | PO | Eaton twp, Madison Co, NY | ||
| Prattsville | PT | Greene Co, NY | 1,989 | water by Schoharie creek |
| Prattsville | PO | Vinton Co, OH | ||
| Prattsville | PO | Autauga Co, AL | ||
| Preble | PT | Cortland Co, NY | 1,312 | water by Toughnioga river |
| Preble | T | Pike Co, OH | 914 | |
| Preble | T | Adams Co, IN | 547 | |
| Precinct | PO | Boone Co, IL | ||
| Pre-Emption | PO | Mercer Co, IL | ||
| Prentiss Vale | PO | McKean Co, PA | ||
| Prescott | PT | Hampshire Co, MA | water by tributaries of Swift river | |
| Prescott | T | Washington Co, ME | ||
| President Furnace | PO | Venango Co, PA | ||
| Presque Isle | PO | Aroostook Co, ME | ||
| Preston | PT | New London Co, CT | ||
| Preston | PT | Chenango Co, NY | 1,082 | water by tributaries of Chenango river |
| Preston | PT | Wayne Co, PA | 875 | |
| Preston | PO | Crosby twp, Hamilton Co, OH | ||
| Preston | PO | Yallabusha Co, MS | ||
| Preston | PO | Wharton Co, TX | ||
| Prestonburgh | PV, CH | Floyd Co, KY | seat of justice, water by west fork of Sandy river | |
| Preston Hollow | PV | Rensselaerville twp, Albany Co, NY | ||
| Prestonville | PV | Carroll Co, KY | ||
| Prewett's Knob | PO | Barren Co, KY | ||
| Price | PO | Huntington Co, IN | ||
| Priceburgh | PO | Monroe Co, PA | ||
| Pricetown | PV | Ruscomb Manor twp, Berks Co, PA | ||
| Pricetown | PO | Highland Co, OH | ||
| Priceville | PV | Price twp, Wayne Co, PA | ||
| Prillaman's | PO | Franklin Co, VA | ||
| Primerose | PO | Lee Co, IA | ||
| Primerose | PO | Dane Co, WI | ||
| Prince Edward | PV, CH | Prince Edward Co, VA | seat of justice | |
| Prince Edward | PO | Gilmer Co, GA | ||
| Prince Fredericktown | PV, CH | Calvert Co, MD | seat of justice, water by Parker's creek | |
| Prince George | PV, CH | Prince George Co, VA | seat of justice | |
| Princess Ann | PV, CH | Somerset Co, ME | water by Manokin river | |
| Princess Ann | PV, CH | Princess Ann Co, VA | ||
| Princeton | PV | Washington Co, ME | 280 | water by Schoodic lake |
| Princeton | PT | Worcester Co, MA | 1,318 | water by tributaries of Nashua & Wave rivers |
| Princeton | PT | Schenectady Co, NY | 1,031 | water by Norman's kill |
| Princeton | PV | Mercer Co, NJ | on Delaware & Raritan canal, seat of college of New Jersey | |
| Princeton | PV, CH | Washington Co, MS | seat of justice, water by Mississippi river | |
| Princeton | PV, CH | Caldwell Co, KY | seat of justice | |
| Princeton | PV, CH | Liberty twp, Butler Co, OH | seat of justice | |
| Princeton | PV | Bureau Co, IL | ||
| Princeton | PV | Scott Co, IA | water by Mississippi river | |
| Princeton | PV, CH | Gibson Co, IN | 806 | seat of justice |
| Princeton | PT, CH | Dallas Co, AR | 1,163 | seat of justice |
| Princeton | PO | Jackson Co, AL | ||
| Princeton | PO | Mercer Co, MO | ||
| Princeton | PO | Marquette Co, WI | ||
| Princeton | PV | Mercer Co, VA | ||
| Princeville | PV | Peoria Co, IL | ||
| Prince William | PO | Carroll Co, IN | ||
| Principio | PO | Cecil Co, MD | ||
| Privateer | PO | Sumter dist, SC | ||
| Proctor | PO | Owsley Co, KY | ||
| Proctor | PO | Allegan Co, MI | ||
| Proctor | PO | Wetzel Co, VA | ||
| Proctor's Creek | PO | Chesterfield Co, VA | ||
| Proctorsville | PV | Crawford Co, IN | water by Great Blue river | |
| Proctorsville | PO | Windsor Co, VT | ||
| Prompton | PO | Wayne Co, PA | ||
| Prophetstown | PO | Whitesides Co, IL | ||
| Prospect | PT | Waldo Co, ME | 2,467 | water by Penobscot river & bay |
| Prospect | PT | New Haven Co, CT | 666 | |
| Prospect | PO | Remsen twp, Oneida Co, NY | ||
| Prospect | PV | Muddy Creek twp, Butler Co, PA | 254 | |
| Prospect | PO | Prince Edward Co, VA | ||
| Prospect | PO | Marion Co, OH | ||
| Prospect | PO | Giles Co, TN | ||
| Prospect | PO | Burleson Co, TX | ||
| Prospect Ferry | PO | Waldo Co, ME | ||
| Prospect Grove | PO | Scotland Co, MO | ||
| Prospect Hall | PO | Bladen Co, NC | ||
| Prospect Harbor | PO | Prospect twp, Hancock Co, ME | ||
| Prospect Hill | PO | Pittstown twp, Rensselaer Co, NY | ||
| Prospect Hill | PO | Fairfax Co, VA | ||
| Prospect Hill | PO | Caswell Co, NC | ||
| Prospect Hill | PO | Lincoln Co, TN | ||
| Prospect Hill | PO | Ray Co, MO | ||
| Prospect Hill | PO | Waukesha Co, WI | ||
| Prospect Lake | PO | Van Buren Co, MI | ||
| Prospect Mills | PO | Lycoming Co, PA | ||
| Prosperity | PO | Moore Co, NC | ||
| Prosperity | PO | Newberry dist, SC | ||
| Prosperity | PO | Washington Co, PA | ||
| Prosperity | PO | Van Buren Co, MI | ||
| Providence | City | Providence Co, RI | 44,512 | seat of justice, Capital w Newport |
| Providence | PT | Saratoga Co, NY | 1,458 | water by Sacandaga river |
| Providence | PT | Luzerne Co, PA | 4,467 | water by Lackawannock creen & Roaring brook |
| Providence | PT | Bedford Co, PA | ||
| Providence | PV | Fairfax Co, VA | ||
| Providence | PV | Mecklenburg Co, NC | ||
| Providence | PV | Pickens Co, AL | ||
| Providence | PV | Hopkins Co, KY | ||
| Providence | PV | Bureau Co, IL | ||
| Providence | PV | Lucas Co, OH | 467 | |
| Providence | PO | Sumter Co, GA | ||
| Providence | PO | Carroll Co, MS | ||
| Providence Hill | PO | Tyler Co, TX | ||
| Provincetown | PB | Barnstable Co, MA | 3,157 | water by Cape Cod bay |
| Proviso | PO | Cook Co, IL | ||
| Prune Hill | PO | Montgomery Co, AL | ||
| Pruntys | PO | Patrick Co, VA | ||
| Pruntytown | PV, CH | Taylor Co, VA | seat of justice, water by Tygart's Valley river | |
| Pryor's Vale | PO | Amherst Co, VA | ||
| Public Square | PO | Greene Co, GA | ||
| Pucketas | PO | Westmoreland Co, PA | ||
| Puebla | PO | Westmoreland Co, PA | ||
| Puebla | PO | Brown Co, OH | ||
| Pugh's Hill | PO | Franklin Co, NC | ||
| Pughtown | PV | Coventry twp, Chester Co, PA | water by French creek | |
| Pugsley's Depot | PO | Tompkins Co, NY | ||
| Pulaski | V, CH | Richland twp, Oswego Co, NY | seat of justice with Oswego, water by Salmon river | |
| Pulaski | PV | Lawrence Co, PA | ||
| Pulaski | PV, CH | Giles Co, TN | seat of justice, water by Richland creek | |
| Pulaski | PT | Jackson Co, MI | 760 | south branch of Kalamazoo river |
| Pulaski | PV | Hancock Co, IL | ||
| Pulaski | PO | Panola Co, TX | ||
| Pulaski | PO | Scott Co, MS | ||
| Pulaski | PO | Williams Co, OH | ||
| Pulaskiville | PV | Morrow Co, OH | ||
| Pultney | PT | Steuben Co, NY | 1,815 | water by west branch of Crooked lake |
| Pultney | T | Belmont Co, OH | ||
| Pultneyville | PV | Williamson twp, Wayne Co, NY | water by Lake Ontario | |
| Pulver's Corners | PO | Pine Plains twp, Dutchess Co, NY | ||
| Pumpkin | PO | Southampton Co, VA | ||
| Pumpkin Pike | PO | Paulding Co, GA | ||
| Pumpkintown | PV | Pickens dist, SC | ||
| Pumpkintown | PO | Randolph Co, GA | ||
| Pumpkin Vine | PO | Paulding Co, GA | ||
| Puncheon | PO | Allen Co, KY | ||
| Pungo Creek | PO | Beaufort Co, NC | ||
| Pungoteague | PV | Accomac Co, VA | ||
| Punxetawny | PV | Young twp, Jefferson Co, PA | water by tributary if Mahoning creek | |
| Purcel's Store | PO | Loudoun Co, VA | ||
| Purdy | PV, CH | McNairy Co, TN | seat of justice, water by a tributary of Hatchy river | |
| Purdy Creek | PO | Hornellsville twp, Steuben Co, NY | ||
| Purdy's Station | PO | Westchester Co, NY | ||
| Purgitsville | PO | Hampshire Co, VA | ||
| Purvis | PO | Rockland twp, Sullivan Co, NY | ||
| Puseyville | PO | Lancaster Co, PA | ||
| Pushmataha | PO | Choctaw Co, AL | ||
| Pushuta | T | Allen Co, OH | ||
| Putnam | PT | Washington Co, NY | 753 | water by Lake Champlain & Lake George |
| Putnam | PT | Muskingum Co, OH | 1,383 | water by Muskingum river |
| Putnam | T | Livingston Co, MI | 977 | |
| Putnam Valley | PT | Putnam Co, NY | 1,626 | water by Peekskill creek & several lakes |
| Putnamville | PV | Putnam Co, IN | ||
| Putney | PT | Windham Co, VT | 1,425 | water by Connecticut river at the falls of Sacket's brooks |
| Putneyville | PO | Armstrong Co, PA | ||
| Pylesville | PO | Harford Co, MD | ||
| Pymatuning | PT | Mercer Co, PA | 2,161 | |
| Pyrmont | PO | Montgomery Co, OH |