1850 Atlas
| Name | What | Place | Pop | Other |
| Amacetta | PO | Wayne Co, VA | ||
| Amagansett | PV | East Hampton Twp, Suffolk Co, NY | ||
| Amanda | PO | Greenup Co, KY | ||
| Amanda | PT | Fairfield Co, OH | 1.368 | water by Clear creek |
| Amanda | T | Allen Co, OH | 607 | |
| Amanda | T | Hancock Co, OH | 1,162 | |
| Amandaville | PO | Elbert Co, GA | ||
| Amber | PV | Otisco Twp, Onondago Co, NY | ||
| Amberson's Valley | PO | Franklin Co, PA | ||
| Ambler's Mills | PO | Louisa Co, VA | ||
| Amboy | PO | Ashtabula Co OH | ||
| Amboy | PO | Washington Co, IA | ||
| Amboy | T | Lucas Co, OH | ||
| Amboy | PT | Oswego Co, NY | 1,132 | now called Cartersville |
| Amelia | PO | Clermont Co, OH | ||
| Amelia | PV, CH | Amelia Co, VA | seat of justice | |
| Amenia | PT | Dutchess Co, NY | 2,222 | |
| Amenia Union | PV | Amenia Twp, Dutchess Co, NY | ||
| Ameniaville | V | Amenia Twp, Dutchess Co, NY | ||
| America | PV | Wabash Co, IN | ||
| Americus | PV, CH | Sumpter Co, GA | seat of justice | |
| Americus | PO | Tippecanoe Co, IN | ||
| Ames | PV | Canajoharie Twp, Montgomery Co, NY | ||
| Ames | T | Athens Co, OH | 1,482 | |
| Amesbury | PT | Essex Co, MA | 3,143 | water by Merrimac & Powow rivers, also know as Amesbury Mills |
| Amesville | PV | Ames Twp, Athens Co, OH | ||
| Amesville | PO | Boone Co, IL | ||
| Amesville | PO | Ulster Co, NY | ||
| Amicalola | PO | Lumpkin Co, GA | ||
| Amherst | PT | Hancock Co, ME | 323 | |
| Amherst | PT, CH | Hillsborough Co, NH | 1,613 | seat of justice, water by Souhegan river |
| Amherst | PT | Hsmpshire Co, MA | 3,057 | |
| Amherst | PT | Lorain Co, OH | 1,399 | |
| Amherst | T | Erie Co, NY | 4,153 | water by Tonawanda & Ellicott's creeks |
| Amherst | PV, CH | Amherst Co, VA | seat of justice | |
| Amissville | PO | Rappahannock Co, VA | ||
| Amittsville | PO | Monongalia Co, VA | ||
| Amity | PV | Aroostook Co, ME | 256 | |
| Amity | T | Alleghany Co, NY | 1,792 | water by Tennessee river |
| Amity | T | Berks Co, PA | 1,566 | water by Manatawny & Manokesy creeks |
| Amity | T | Erie Co, PA | 739 | |
| Amity | PV | Washington Co, PA | ||
| Amity | PO | Scott Co, IA | ||
| Amity | PO | Clark Co, AR | ||
| Amity | PO | Johnson Co, IN | ||
| Amity Hill | PO | Iredell Co, NC | ||
| Amityville | PO | Suffolk Co, NY | ||
| Ammonia | PO | Shelby Co, TN | ||
| Amoskeag | PV | Goffstown Twp, Hillsborough Co, NH | ||
| Amsterdam | PV | Botetourt Co, VA | ||
| Amsterdam | PV | Carroll Twp, Jefferson Co, OH | ||
| Amsterdam | PO | Cass Co, IN | ||
| Amsterdam | T | Montgomery Co, NY | 4,128 | water by Mohawk river |
| Amsterdam | PV | Amsterdam Twp, Montgomery Co, NY | ||
| Amwell | T | Hunterdon Co, NJ | water by Raritan river | |
| Amwell | T | Washington Co, PA | 1,754 | water by Ten Mile creek |
| Anadarco | PO | Rusk Co, TX | ||
| Anahuac | PO | Liberty Co, TX | ||
| Anamosa | PO | Jones Co, IA | ||
| Analomink | PO | Cherokee Co, TX | ||
| Anandale | PO | Butler Co, PA | ||
| Anandale | PO | Fairfax Co, VA | ||
| Anaquascook | PO | Washington Co, NY | ||
| Ancient | PO | Dame Co, WI | ||
| Angram | PT | Columbia Co, NY | 1,569 | water by Ancram & Punch creels |
| Amgram Lead Mines | PV | Ancram Twp (in NY) | 50 miles SSE of Albany, NY | |
| Andalusia | PO | Bucks Co, PA | ||
| Andalusia | PO | Covington Co, AL | ||
| Anderson | PO | Warren Co, NJ | ||
| Anderson | T | Warrick Co, IN | 392 | |
| Anderson | CH | Anderson Dist, SC | seat of justice | |
| Anderson | T | Hamilton Co, OH | water by Ohio river | |
| Anderson | T | Rush Co, IN | ||
| Anderson | PO | Walker Co, GA | ||
| Anderson | PO | Grimes Co, TX | ||
| Anderson | PO | Clark Co, IL | ||
| Andersonburgh | PO | Perry Co, PA | ||
| Anderson River | PO | Spencer Co, IN | ||
| Anderson's Mills | PO | Butler Co, PA | ||
| Anderson's Store | PO | Caswell Co, NC | ||
| Anderson's Store | PO | McNairy Co, TN | ||
| Anderson's Store | PO | Morgan Co, OH | ||
| Andersontown | PV, CH | Madison Co, IN | seat of justice, water by White river | |
| Andersonville | V | Pickens Dist, SC | ||
| Andersonville | PV | Anderson Dist, SC | ||
| Andersonville | PV | Franklin Co, IN | ||
| Andersonville | PO | Saline Co, IL | ||
| Andes | PT | Delaware Co, NY | 2,672 | water by Papacton branch of Delaware river |
| Andesville | PO | Perry Co, PA | ||
| Andora | PO | Philadelphia Co, PA | ||
| Andover | PT | Oxford Co, ME | 710 | water by Ellis river |
| Andover | PT | Merrimack Co, NH | 1,220 | water by Blackwater river |
| Andover | PT | Windsor Co, VT | 725 | water by Williams river |
| Andover | PT | Essex Co, MA | 6,945 | water by Merrimac & Shawsheen rivers, Andover Theological Seminary |
| Andover | PV | Sussex Co, NJ | ||
| Andover | PV | Tolland Co, CT | 300 | |
| Andover | PT | Alleghany Co, NY | 1,476 | |
| Andover | V | Clahoun Co, MI | ||
| Andover | PV | Henry Co, IL | ||
| Andover | PT | Ashtabula Co, OH | 963 | |
| Andrew | PO | Jackson Co, IA | ||
| Andrew Chapel | PO | Madison Co, TN | ||
| Andrews | PV | Marrow Co, OH | ||
| Andrews | PO | Spottsylvania Co, VA | ||
| Andrews Bridge | PO | Lancaster Co, PA | ||
| Angelica | PV, CH | Allegahny Co, NY | 1,592 | seat of justice |
| Angley's Branch | PO | Barnwell Dist, SC | ||
| Angola | PO | Collins Twp, Erie Co, NY | ||
| Angola | PO | Sussex Co, DE | ||
| Angola | PO | Onslow Co, NC | ||
| Angola | PO | Lake Co, IL | ||
| Angola | PV, CH | Steuben Co, IN | seat of justice | |
| Angostura | PO | Pike Co, IN | ||
| Anguilla | PO | Clay Co, IN | ||
| Annapolis | PV | Salem Twp, Jefferson Co, OH | ||
| Annapolis | PO | Park Co, IN | ||
| Annapolis | City | Anne Arundel Co, MD | ||
| Annapolis Junction | PO | Anne Arundel Co, MD | ||
| Ann Arbor | PV, CH | Washtenaw Co, MI | 4,868 | seat of justice, water by Huron river |
| Annawaika | PO | DeKalb Co, AL | ||
| Annisquam | PO | Essex Co, MA | ||
| Annin Creek | PO | McKean Co, PA | ||
| Annsburgh | T | Washington Co, ME | ||
| Annsville | T | Oneida Co, NY | 2,688 | water by Fish creek |
| Annsville | V | Dinwiddle Co, VA | ||
| Annville | PT | Lebanon Co, PA | water by Quitapahilla creek | |
| Anselm | PO | Gallia Co, OH | ||
| Anson | PT | Somerset Co, ME | 848 | water by Kennebec river |
| Ansonia | PV | New Haven Co, CT | ||
| Antestown | PO | Blair Co, PA | ||
| Antestown | V | Huntingdon Co, PA | ||
| Antes | PT | Huntingdon Co, PA | ||
| Anthony | PO | Delaware Co, IN | ||
| Anthony | PO | Kent Co, RI | ||
| Anthony's Creek | PO | Greenbrier Co, VA | ||
| Anthony's Shoals | PO | Elbert Co, GA | ||
| Anti-Bank | PO | Hinds Co, MS | ||
| Antioch | PO | Pickens Co, AL | ||
| Antioch | PO | Monroe Co, OH | ||
| Antioch | PO | Barren Co, KY | ||
| Antioch | PO | Lake Co, IL | ||
| Antioch | PO | Gibson Co, TN | ||
| Antioch | PO | York Co, SC | ||
| Antioch | PO | Contra Costa Co, CA | ||
| Antoine | PT | Clark Co, AR | 269 | |
| Antrim | PT | Hillsborough Co, NH | 1,143 | water by Contocook & North Branchriver |
| Antrim | PV | Guernsey Co, OH | ||
| Antrim | T | Crawford Co, OH | ||
| Antrim | T | Franklin Co, PA | 3,005 | water by Conecheague creek |
| Antrim | PO | Alleghany Co, PA | ||
| Antrim | PT | Shiawasse Co, MI | ||
| Antwerp | PT | Jefferson Co, NY | 3,665 | water by Qswegatchic & Indian rivers |
| Antwerp | PO | Paulding Co, OH | ||
| Antwerp | T | Van Buren Co, MI | 614 | |
| Anvil | PO | Clark Co, AR | ||
| Aonia | PO | Wilkes Co, GA | ||
| Apalachin | PO | Tioga Co, NY | ||
| Apollo | PV | Armstrong Co, PA | 331 | |
| Appalachicola | PV, CH | Franklin Co, FL | seat of justice | |
| Apanoos | PO | Hancock Co, IL | ||
| Apperson's | PO | Charles City Co, VA | ||
| Apple Creek | PO | Wayne Co, OH | ||
| Apple Creek | PO | Cape Girardeau Co, MO | ||
| Apple Creek | PO | Morgan Co, IL | ||
| Apple Grove | PO | York Co, PA | ||
| Apple Grove | PO | Morgan Co, AL | ||
| Apple Grove | PO | Polk Co, IA | ||
| Apple Grove | PO | Meigs Co,TN | ||
| Appleton | PO | Bennington Twp, Licking Co, OH | ||
| Appleton | T | Waldo Co, ME | 1,727 | water by St George's & Muscongus rivers |
| Appleton | PO | Perry Co, IL | ||
| Appleton | PO | Winnebago Co, WI | ||
| Appling | PO | Jefferson Co, NY | ||
| Appling | PV, CH | Columbia Co, GA | seat of justice, water by Great Kiokee creek | |
| Appomattox Depo | PO | Amelia Co, VA | ||
| Appoqumimink Hundred | New Castle Co, DE | |||
| Apulia | PO | Fabius Twp, Onondaga Co, NY | ||
| Aquackanock | PO | Paxxaic Co, NJ | ||
| Aquasco | PO | Prince George's Co, MD | ||
| Aquebogue | PV | Riverhead Twp, Suffolk Co, NY | ||
| Aqueduct | PO | Stafford Co, VA | water by Aquia creek | |
| Aquia | PO | Stafford Co, VA | water by Aquia creek | |
| Aquilla | PO | Franklin Co, GA | ||
| Aquone | PO | Macon Co, NC | ||
| Aransas | PO | Refugio Co, TX | ||
| Ararat | PO | Washington Co, AL | ||
| Ararat | PO | Patrick Co, VA | ||
| Arator | PO | Pettis Co, MO | ||
| Arba | PO | Randolph Co, IN | ||
| Arbacoochee | PO | Randolph Co, AL | ||
| Arbuckle | PO | Mason Co, VA | ||
| Arcadia | PO | Washington Co, RI | ||
| Arcadia | PT | Wayne Co, NY | 5,145 | water by Meed creek |
| Arcadia | V | Arcadia Twp, Wyane Co, NY | on the Erie Canal | |
| Arcadia | PO | Sullivan Co, TN | ||
| Arcadia | PO | Madison Co, MO | ||
| Arcadia | PO | Morgan Co, IL | ||
| Arcadia | T | Kalamazoo Co, MI | ||
| Arcadia | PO | Bienville Parish, LA | ||
| Archer | PT | Harrison Co, OH | 875 | |
| Archibald | PO | Luzerne Co, PA | ||
| Arcola | PO | Loudoun Co, VA | ||
| Arcola | PO | Warren Co, NC | ||
| Arden | PO | Berkley Co, VA | ||
| Arena | PO | Iowa Co, WI | ||
| Arendtsville | PO | Adams Co, PA | ||
| Arenosa | PO | Victoria Co, TX | ||
| Arenzville | PO | Morgan Co, IL | ||
| Argentine | PO | Genesee Co, MI | ||
| Argo | PO | Hall Co, GA | ||
| Argo | PO | Crawford Co, MO | ||
| Argo | PO | Carroll Co, IL | ||
| Argosville | PO | Schoharie Co, NY | ||
| Argus | PO | Montgomery Co, AL | ||
| Argyle | PT | Penobscot Co, ME | ||
| Argyle | T | Cumberland Co, NC | ||
| Argyle | PT | Washington Co, NY | 3,274 | |
| Argyle | PO | Jefferson Co, MO | ||
| Argyle | PO | McDonough Co, IL | ||
| Argyle | PO | Lafayette Co, WI | ||
| Ariel | PO | Marion Dist, SC | ||
| Ariel | PO | Wayne Co, PA | ||
| Arietta | T | Hamilton Co, NY | water by Canada & Sacondaga rivers | |
| Arispe | PO | Bureau Co, IL | ||
| Ark | PO | De Kalb Co, GA | ||
| Ark | PO | Lafayette Co, AR | ||
| Arkadelphia | PV, CH | Clark Co, AR | seat of justice | |
| Arkansas | T | Arkansas Co, AR | 584 | |
| Arkansas Post | PV, CH | Arkansas Co, AR | seat of justice, water by Arkansas river | |
| Arkport | PV | Hornellsville Twp, Steuben Co, NY | water by Canisteo river | |
| Arkville | PO | Middletown Twp, Delaware Co, NY | ||
| Arkwright | PT | Chautauque Co, NY | 1,283 | |
| Arlington | PT | Bennington Co, (no state given) | 1,084 | water by Green river |
| Arlington | PO | Hancock Co, OH | ||
| Arlington | PO | Bureau Co, IL | ||
| Armada | PT | Macomb Co, MI | 1,146 | |
| Armagh | PB | Indiana Co, PA | ||
| Armagh | T | Mifflin Co, PA | 1,742 | |
| Armenia | PO | Scriven Co, GA | ||
| Armiesburgh | PO | Parke Co, IN | ||
| Armington | PO | Tazewell Co, IL | ||
| Armstrong | T | Indiana Co, PA | 1,185 | |
| Armstrong | PO | Wabash Co, IL | ||
| Armstrong | PT | Vanderburgh Co, IN | 849 | |
| Armstrong's Mills | PO | Belmont Co, OH | ||
| Armuchee | PO | Floyd Co, GA | ||
| Arneytown | PV | Hanover Twp, Burlington Co, NJ | ||
| Arnheim | PO | Brown Co, OH | ||
| Arnoldsburgh | T | Gilmer Co, VA | ||
| Arnoldton | PV | Campbell Co, VA | ||
| Arnoldton | PO | Ulster Co, NY | ||
| Arnon | PO | Will Co, IL | ||
| Arrow Rock | PV | Saline Co, MO | on Missouri river | |
| Arrowsmith's | PO | Defiance Co, OH | ||
| Arsenal | PO | Alleghany Co, PA | ||
| Arthursburgh | PO | La Grange Twp, Dutchess Co, NY | ||
| Arthurton | PO | McHenry Co, IL | ||
| Artic | PO | De Kalb Co, IN |