1850 Atlas
| Name | what | Place | Pop | Other |
| Aaronsburgh | PV | Haines Twp, Centre Co, PA | 89 miles NW of Harrisburg | |
| Aaron's Run | PO | Montgomery co, KY | 65 miles E of Frankfort | |
| Abberville | PO | Lafayette Co, MS | ||
| Abberville | CH, PV | Abberville District, SC | 371 | seat of justice |
| Abberville | CH, PV | Henry Co, AL | seat of justice on Yattayaba Creek | |
| Abberville | PO | Vermillion Parish, LA | ||
| Abberville | PV | Medina Co, OH | ||
| Abbot | PT | Piscataquis Co, ME | 747 | 70 miles NE of Augusta |
| Abbott's Creek | PO | Davidson Co, NC | ||
| Abbotsford | PO | Westchester Co, NY | ||
| Abbottown | PV | Berwick Twp, Adams Co, PA | 29 miles S of Harrisburg on Beaver Creek | |
| Aberdeen | PV | Monroe Co, MS | on Tombigee river | |
| Aberdeen | PT | Brown Co, OH | 807 | on Ohio river |
| Aberdeen | PO | Monroe Co, AR | ||
| Aberfoil | PO | Macon Co, AL | 158 miles SE of Tuscalosa | |
| Abington | PO | Jefferson Co, IA | ||
| Abington | PV | Washington Co, VA | seat of justice on Holston river | |
| Abington | PV | Harford Co, MD | ||
| Abington | PO | Lake Co, IL | ||
| Abington | PT | Plymouth Co, MA | 5269 | |
| Abington | PV | Pomfret Twp, Windham Co, CT | ||
| Abington | PT | Montgomery Co, PA | 1,836 | |
| Abington | PT | Wayne Co, IN | 206 | on White River |
| Abington Centre | PV | Luzerne Co, PA | (has now Waverly) | |
| Aboite | PT | Allen Co, IN | ||
| Abram's Plains | PO | Granville Co, NC | 1,767 | |
| Abscota | PO | Calhoun Co, MI | ||
| Absecum or Abesecon | V | Galloway Twpm Atlantic Co, NJ | 95 miles S of Trenton on Absecum Creek | |
| Academia | PO | Knox Co, TN | ||
| Academia | PO | Juniata Co, PA | ||
| Academy | PO | Ontario Co, NY | ||
| Acasto | PO | Kane Co, IL | ||
| Accatink | PO | Fairfax Co, VA | ||
| Accident | PO | Alleghany Co, MD | ||
| Accomac | CH, PV | Accomac Co, VA | seat of justice | |
| Accoman | PO | Accomac Co, VA | ||
| Accord | PO | Ulster Co, NY | ||
| Achor | PO | Columbiana Co, OH | ||
| Achorstown | V | Achor Twp, Columbiana Co, OH | ||
| Acquackanonck | PT | Passaic Co, NJ | 2,925 | on Passaic river, at head of sloop navigation |
| Acquinton | PO | King William Co, VA | ||
| Acra | PV | Greene Co, NY | 47 miles SSW of Albany | |
| Acton | PT | York Co, ME | 1,359 | near head waters of Salmon Fall river |
| Acton | T | Windham Co, VT | ||
| Acton | PT | Middlesex Co, MA | 1,605 | on Assabet river |
| Acton Corner | PO | Yor Co, ME | ||
| Acworth | PT | Sullivan Co, NH | 1,251 | water by Cold river |
| Acworth | PO | Cobb Co, GA | ||
| Ada | PT | Kent Co, MI | 593 | water by Grand River |
| Adair's | PO | Natchitoches Parish, LA | ||
| Adairsville | PO | Cass Co, GA | ||
| Adairsville | PV | Logan Co, KY | ||
| Adaline | PO | Marshall Co, VA | ||
| Adams | PT | Berkshire Co, MA | 6,172 | water by Hoosack river |
| Adams | PT | Jefferson Co, NY | 3,106 | water by Sandy Creek |
| Adams | T | Coshocton Co, OH | 1,419 | water byTuscarawas river |
| Adams | T | Guernsey Co, OH | 880 | |
| Adams | T | Monroe Co, OH | 1,092 | |
| Adams | PT | Seneca Co, OH | 1,146 | water by Green Creek |
| Adams | T | Washington Co, OH | 1,293 | water by Muskingum river |
| Adams | T | Muskingum Co, OH | 998 | water by Wils Creek & Muskingum River |
| Adams | T | Darke Co, OH | 414 | water by Greenville & Panther Creeks |
| Adams | T | Champaign Co, OH | 1,123 | water by Stony & Tawawa Creeks |
| Adams | PT | Hillsdale Co, MI | 1,129 | |
| Adams | PT | Decatur Co, IN | 1,593 | |
| Adams | T | Hamilton Co, IN | 861 | |
| Adams | PO | Irwin Co, GA | ||
| Adams | PO | Walworth Co, WI | ||
| Adams Basin | PV | Monroe Co, NY | on Erie Canal | |
| Adamsburgh | PV | Hempfield Twp, Westmoreland Co, PA | 963 | |
| Adams Centre | PO | Jefferson Co, NY | ||
| Adams' Mills | PO | Pulaski Co, KY | ||
| Adam's Run | PO | Colleton Dist, SC | ||
| Adamstown | PV | Cocallco Twp, Lancaster Co, PA | ||
| Adamstown | PO | Frederick Co, MD | ||
| Adamsville | PO | Kingbury Twp, Washington Co, NY | ||
| Adamsville | PO | Newport Co, RI | ||
| Adamsville | PO | Crawford Co, PA | ||
| Adamsville | PO | Muskingum Co, OH | ||
| Adamsville | PV | Ontwa Twp, Cass Co, MI | water by Christinia river | |
| Adamsville | PO | Franklin Co, MA | ||
| Adamsville | PV | McNairy Co, TN | ||
| Adamsville | PO | Harrison Co, VA | ||
| Adamsville | V | Marlborough Dist, SC | ||
| Adamsville | PO | Morgan Co, KY | ||
| Adario | PO | Richland Co, OH | ||
| Adario Creek | PO | Wemnesha Co, WI | ||
| Addison | PT | Addison Co, VT | 1,279 | on Lake Champlain |
| Addison | PT | Washington Co, ME | 1,152 | |
| Addison | PT | Steuben Co, NY | 3,721 | water by Canistro & Tuscarora creeks |
| Addison | PT | Somerset Co, PA | 1,665 | water by Youghiogeny river |
| Addison | PV | Dupage Co, IL | ||
| Addison | T | Oakland Co, MI | 924 | |
| Addison | PT | Shelby Co, IN | 1,917 | |
| Addison | PT | Gallia Co, OH | 924 | |
| Addison Point | PO | Addison Twp, Washington Co, ME | ||
| Adeline | PO | Ogle Co, IL | ||
| Adell | PO | Dallas Co, IA | ||
| Adelphi | PO | Ross Co, OH | ||
| Adelphia | PV | Coiraine Twp, Ross Co, OH | 412 | water by Salt creek |
| Adirondack | PO | Essex Co, NY | ||
| Adolph | PO | Chatham Co, NC | ||
| Adrian | PT | Lenawee Co, MI | 3,006 | seat of justice, water by Beaver creek & Raisin River |
| Adriance | PO | Fishkill Twp, Dutchess Co, NY | ||
| Adventure | PO | Ontonagon Co, MI | ||
| Agawam | PV | West Springfield Twp, Hampden Co, MA | water by Connecticut river | |
| Agency City | PT | Wapello Co, IA | ||
| Agnew's Mills | PO | Venango Co, PA | ||
| Agua Trio | PO | Mariposa Co, CA | ||
| Ar (this is the name) | PO | Grant Co, IN | 60 miles NE of Indianapolis | |
| Ard | T | Lawrence Co, OH | 884 | seat of justice |
| Aiken | PV | barnwell Dist, SC | ||
| Aiken's Store | PO | Montgomery Co, AR | ||
| Air | T | Bedford Co, PA | ||
| Air Mount | PO | Clarke Co, AL | ||
| Airy Grove | PV | Lenoir Co, NC | ||
| Akron | PV | Erie Co, NY | water by Muddy creek | |
| Akron | CH, PO | Portage Twp, Summit Co, OH | 3.266 | seat of justice, on Ohio & PA canals |