1850 Atlas
| Name | What | Place | Pop | Other |
| Alabama | PT | Genesee Co, NY | 2,954 | water by Tonawanda creek |
| Alamo | PT | Kalamazoo Co, MI | 420 | |
| Alamo | PO | Montgomery Co, IN | ||
| Alamode | PO | Reynolds Co, MO | ||
| Alamutcha | PO | Lauderdale Co, MS | ||
| Alanthus Grove | PO | Gentry Co, MO | ||
| Alaqua | PV | Walton Co, FL | water by Alaqua river | |
| Alapaha | PO | Lowndes Co, GA | ||
| Alba | PO | Bradford Co, PA | ||
| Albany | City | Albany Co, NY | 50,763 | |
| Albany | T | Bradford Co, PA | 1,043 | water by Towanda & W branch Mahoopeny Creeks |
| Albany | PT | Bedford Co, PA | ||
| Albany | PT | Berks Co, PA | 1,406 | |
| Albany | PT | Oxford Co, ME | 747 | |
| Albany | PT | Orleans Co, VT | 1,052 | water by Black river |
| Albany | PV | Carroll Co, NH | 455 | |
| Albany | T | Strafford Co, NH | ||
| Albany | PO | Delaware Co IN | ||
| Albany | PV | Clinton Co, KY | seat of justice, water by Spring Creek | |
| Albany | PV | Henry Co, TN | ||
| Albany | PV | Baker Co, GA | water by Flint river | |
| Albany | PO | Whiteside Co, IL | ||
| Albany | PO | Greene Co, WI | ||
| Albany | PO | Tuscarawas Co, OH | ||
| Albemarle | CH PV | Stanley Dist, NC | seat of justice | |
| Albemarle | PO | Carroll Co, MS | ||
| Albemarle | PO | Assumption Parish, LA | ||
| Albertson's | PO | Dauphin Co, NC | ||
| Albia | PO | Monroe Co, IA | ||
| Albion | PT | Kennebee Co, ME | 1,604 | |
| Albion | PV | Barre Twp, Orleans Co, NY | 2,251 | seat of justice, on the Erie canal |
| Albion | PT | Oswego Co, NY | 2,010 | |
| Albion | PO | Erie Co, PA | ||
| Albion | PO | Providence Co, RI | ||
| Albion | PV | Fairfield Dist, SC | ||
| Albion | CH PT | Ashland Co, OH | seat of justice | |
| Albion | CH PV | Edwards Co IL | 365 | seat of justice |
| Albion | CH PV | Noble Co, IN | seat of justice | |
| Albion | PT | Calhoun Co, MI | 1,665 | |
| Albion | PO | Dane Co, WI | ||
| Albright's | PO | Des Moines Co, IA | ||
| Albrightsville | PO | Carbon Co, PA | ||
| Alburgh | PT | Grand Isle Co, VT | on lake Champlain | |
| Allburgh Springs | PV | Allburgh Twp, Grand Isle Co, VT | ||
| Alcove | PO | Fond du Lac Co, WI | ||
| Alden | PT | Erie Co, NY | 2,529 | |
| Alden | PO | McHenry Co, IL | ||
| Aldenville | PO | Wayne Co, PA | ||
| Alder Branch | PO | Bradley Co, TN | ||
| Alder Brook | PO | Independence Co, AR | ||
| Alder Creek | PO | Booneville Twp, Oneida Co, NY | ||
| Alder Creek | PO | Dubois Co, IN | ||
| Aldie | PO | Loudoun Co, VA | ||
| Aledon | T | Ingham Co, MI | ||
| Aleppo | T | Greene Co, PA | 1,176 | |
| Alert | PO | Butler Co, OH | ||
| Alexander | PT | Washington Co, ME | 544 | |
| Alexander | T | Licking Co, OH | ||
| Alexander | PT | Greene Co, NY | 1,927 | water by Tonawanda Creek |
| Alexander | PO | Putnam Co, VA | ||
| Alexander | PT | Athens Co, OH | 1,735 | |
| Alexander | PO | Burke Co, GA | ||
| Alexandersville | PV | Montgomery Co, OH | on Miami canal | |
| Alexandria | PT | Grafton Co, NH | 1,273 | |
| Alexandria | PT | Jefferson Co, NY | 2,178 | water by St Lawrence river |
| Alexandria | PB | Porter Twp, Huntington Co, PA | ||
| Alexandria | T | Hunterdon Co, NJ | 3,811 | |
| Alexandria | PO | St Albans Twp, Licking Co, OH | ||
| Alexandria | PV | Campbell Co, KY | water by Ohio river | |
| Alexandria | PV | DeKalb Co, TN | water by Lickneus creek | |
| Alexandria | PO | Madison Co, IN | ||
| Alexandria | PO | Clarke Co, MO | ||
| Alexandria | PO | Benton Co, AL | ||
| Alexandria | PV, CH | Rapides Parish, LA | seat of justice | |
| Alexandria Centre | PO | Alexandria Twp, Jefferson Co, NY | ||
| Alexandriana | PV | Mecklenburg Co, NC | ||
| Alfont | PO | Madison Co, IN | ||
| Alford | PT | Berkshire Co, MA | 502 | |
| Alfordville | PV | Robeson Co, NC | ||
| Alfred | PT | York Co, ME | 1,319 | seat of justice with York |
| Alfred | PT | Alleghany Co, NY | 2,679 | |
| Alfred | PO | Meigs Co, OH | ||
| Alfred Centre | PO | Alfred Twp, Alleghany Co, NY | ||
| Algansi | PT, CH | Branch Co, MI | 609 | |
| Algoma | PO | Winnebago Co, WI | ||
| Algomac | PO | St Clair Co, MI | ||
| Algonquin | PO | Carroll Co, OH | ||
| Algonquin | PO | McHenry Co, IL | ||
| Algood | Spartanburgh Dist, SC | |||
| Alida | PO | Stephenson Co, IL | ||
| Alhambra | PO | Madison Co, IL | ||
| Allamuchy | PO | Warren Co, NJ | ||
| Allandale | PO | Habersham Co, GA | ||
| Allatoona | PO | Cass Co, GA | ||
| Allegan | PT, CH | Allegan Co, MI | 752 | seat of justice, water by Kalamazoo river |
| Alleghany | City | Ross Twp, Alleghany Co, PA | 21,262 | water by Alleghany river |
| Alleghany | T | Armstrong Co, PA | 2,506 | |
| Alleghany | T | Huntington Co, PA | ||
| Alleghany | T | Somerset Co, PA | 948 | water by Rush & Willis creeks |
| Alleghany | T | Potter Co, PA | 381 | |
| Alleghany | T | Venango Co, PA | 1,174 | |
| Alleghany | T | Westmoreland Co, PA | 3,3299 | water by Alleghany river |
| Alleghany | T | Cambria Co, PA | 1,488 | |
| Alleghany | PT | Cattaraugus Co, NY | water by Alleghany river | |
| Alleghany Bridge | PO | McKean Co, PA | ||
| Allen | PT | Alleghany Co, NY | 955 | |
| Allen | T | Dark Co, OH | 290 | |
| Allen | T | Noble Co, IN | 933 | |
| Allen | T | Northampton Co, PA | 1,156 | |
| Allen | T | Union Co, OH | 972 | |
| Allen | T | Hillsdale Co, MI | 1,033 | |
| Allen Centre | PO | Allen Twp, Alleghany Co, NY | ||
| Allen Centre | PO | Union Co, OH | ||
| Allendale | PO | Greene Co, KY | ||
| Allendale | PO | Barnwell Dist, SC | ||
| Allens | PO | Miami Co, OH | ||
| Allensburgh | PO | Highland Co, OH | ||
| Allen's Bridge | PO | Marion Dist, SC | ||
| Allen's Fresh | PO | Charles Co, MD | ||
| Allen's Grove | PO | Lee Co, IL | ||
| Allen's Grove | PO | Walworth Co, WI | ||
| Allen's Hill | PO | Richmond Twp, Ontario Co, NY | ||
| Allen's Settlement | PO | Claiborne parish, LA | ||
| Allenstown | PT | Merrimac Co, NH | 526 | water by Suncook river |
| Allensville | PO | Mifflin Co, PA | ||
| Allensville | PO | Vinton Co, OH | ||
| Allensville | PO | Alleghany Co, NY | ||
| Allensville | PO | Todd Co, KY | ||
| Allensville | PO | Switzerland Co, IN | ||
| Allenton | PO | Washington Co, RI | ||
| Allenton | PV | Wilcox Co, AL | ||
| Allentown | PV | Upper Freehold Twp, Monmouth Co, NJ | ||
| Allentown | PO | Allen Co, OH | ||
| Allentown | PB | Lehigh Co, PA | 3,779 | seat of justice, also called Northampton |
| Alligator | PO | St Mary's parish, LA | ||
| Alligator | PO | Columbia Co, FL | ||
| Allisonville | PO | Marion Co, IN | ||
| Allinsonville | PO | Marion Co, IN | ||
| Allinson | T | Clinton Co, PA | 411 | |
| Allinson | PO | Logan Co, KY | ||
| Alloway | PV | Lyons Twp, Wayne Co, NY | on Canandaigua outlet | |
| Allowaystown | PV | Salem Co, NJ | ||
| Allsborough | PO | Franklin Co, AL | ||
| Almirante | PO | Walton Co, FL | ||
| Almond | PT | Alleghany Co, NY | 1,914 | water by Canistco river |
| Almond | PO | Portage Co, WI | ||
| Almond Grove | PO | Red River Co, TX | ||
| Almont | PO | Lapeer Co, MI | ||
| Alma | PT | Lincoln Co, ME | 916 | water by Sheepscot river |
| Alpha | PO | Greene Co, OH | ||
| Alpine | PO | Chattooga Co, GA | ||
| Alpine | PO | Clark Co, AR | ||
| Alpine Depot | PO | Morgan Co, VA | ||
| Alps | PV | Nassen Twp, Rensselaer Co, NY | ||
| Alquina | PO | Fayette Co, IN | ||
| Alsace | T | Berks Co, PA | 2.697 | water by Schuylkill river |
| Alstead | PT | Cheshire Co, NH | 1,425 | |
| Alston | PO | Fairfield Co, SC | ||
| Altamont | PO | Grundy Co, TN | ||
| Alta Springs | PO | Limeston Co, TX | ||
| Altay | PO | Steuben Co, NY | ||
| Alto | PO | Howard Co, IN | ||
| Alto | PO | Fond du Lac Co, WI | ||
| Alto | PO | Kent Co, MI | ||
| Alto | PO | Louisa Co, VA | ||
| Alton | PT, City | Madison Co, IL | on Mississippi river | |
| Alton | PT | Belknap Cp, NH | 1,795 | on Lake Winnipiscogee |
| Alton | PV | Sodus Twp, Wayne Co, NY | ||
| Alton | PO | Penobscot Co, ME | ||
| Alton | PO | Franklin Co, OH | ||
| Alton | PO | Denton Co, TX | ||
| Alton | PO | Kent Co, MI | ||
| Alton Hill | PO | Macon Co, TN | ||
| Altoona | PO | Blair Co, PA | ||
| Alum Bank | PO | Bedford Co, PA | ||
| Alum Creek | PO | Delaware Co, OH | ||
| Alum Creek | PO | Bastrop Co, TX | ||
| Alum Rock | PO | Alleghany Co, VA | ||
| Alum Springs | PO | Rockbridge Co, VA | ||
| Alvan | PO | Jefferson Co, PA | ||
| Alvira | PO | Lycoming Co, PA |