1850 Atlas
| Name | What | Place | Pop | Other |
| South Abington | PO | Plymouth Co, MA | ||
| South Acworth | PO | Sullivan Co, NH | ||
| South Alabama | PO | Genesee Co, NY | ||
| South Albion | PV | Albion twp, Kennebec Co, ME | ||
| South Albion | PO | Calhoun Co, MI | ||
| South Albion | PO | Oswego Co, NY | ||
| South Alden | PO | Erie Co, NY | ||
| South Alton | PV | Alton twp, Belknap Co, NH | ||
| South Amboy | PT | Middlesex Co, NJ | 2,266 | |
| South Amenia | PO | Amenia twp, Dutchess Co, NY | ||
| South Amherst | PO | Hampshire Co, MA | ||
| South Andover | PO | Oxford Co, ME | ||
| South Anna | PV | Louisa Co, VA | ||
| South Argyle | PO | Argyle twp, Washington Co, NY | ||
| South Assyria | PO | Barry Co, MI | ||
| South Atkinson | PO | Piscataquis Co, ME | ||
| South Attleborough | PV | Attleborough twp, Bristol Co, MA | ||
| South Auburn | PO | Susquehanna Co, PA | ||
| South Avon | PO | Avon twp, Livingston Co, NY | ||
| South Bainbridge | PV | Bainbridge twp, Chenango Co, NY | water by Susquehanna river | |
| South Barre | PV | Barre twp, Washington Co, VT | ||
| South Barre | PO | Barre twp, Orleans Co, NY | ||
| South Bellingham | PO | Norfolk Co, MA | ||
| South Bend | PV, CH | St Joseph Co, IN | seat of justice | |
| South Bend | PO | Arkansas Co, AR | ||
| South Bend | PO | Armstrong Co, PA | ||
| South Bend | PO | Lawrence Co, MO | ||
| South Berne | PO | Albany Co, NY | ||
| South Berwick | PT | York Co, ME | 2,592 | water by Salmon Fall river at the Great Falls |
| South Bloomfield | PO | Harrison twp, Pickaway Co, OH | ||
| South Bloomfield | PO | Somerset Co, ME | ||
| South Boston | PO | Ionia Co, MI | ||
| South Boston | PO | Washington Co, IN | ||
| South Bradford | PO | Merrimack Co, NH | ||
| South Bradford | PO | Orange Co, VT | ||
| South Bradford | PO | Steuben Co, NY | ||
| South Braintree | PO | Norfolk Co, MA | ||
| South Bridgeton | PO | Bridgeton twp, Cumberland Co, ME | ||
| South Bristol | PT | Ontario Co, NY | 1,129 | water by Mud creek & Canandaigua lake |
| South Bristol | PO | Racine Co, WI | ||
| South Britain | PV | Southbury twp, New Haven Co, CT | ||
| South Brookfield | PO | Madison Co, NY | ||
| South Brooks | PO | Waldo Co, ME | ||
| South Brunswick | PT | Middlesex Co, NJ | 3,368 | water by Lawrence's brook & tributaries of Millstone river |
| South Butler | PO | Butler twp, Wayne Co, NY | ||
| South Butler | PO | Butler Co, AL | ||
| South Byron | PO | Byron twp, Genesee Co, NY | ||
| South Cario | PO | Cairo twp, Greene Co, NY | ||
| South Cameron | PO | Cameron twp, Steuben Co, NY | ||
| South Canaan | PO | Essex Co, VT | ||
| South Canaan | PV | Canaan twp, Litchfield Co, CT | water by Housatonic river | |
| South Carroll | PO | Carroll Co, TN | ||
| South Carbollton | PO | Muhlenburgh Co, KY | ||
| South Carthage | PO | Franklin Co, ME | ||
| South Carver | PO | Plymouth Co, MS | ||
| South Cass | PO | Cass twp, Ionia Co, MI | ||
| South Charleston | PV | Madison twp, Clark Co, OH | 413 | |
| South Charleston | PO | Sullivan Co, NH | ||
| South Chesterville | PO | Chesterville twp, Franklin Co, ME | ||
| South China | PO | China twp, Kennebec Co, ME | ||
| South Columbia | PO | Columbia twp, Herkimer Co, NY | ||
| South Corinth | PO | Corinth twp, Saratoga Co, NY | ||
| South Cortland | PO | Cortlandville twp, Cortland Co, NY | ||
| South Coventry | PO | Coventry twp, Tolland Co, CT | ||
| South Craftsbury | PO | Orleans Co, VT | ||
| South Creek | PT | Bradford Co, PA | 709 | |
| South Creek | PO | Beaufort dist, SC | ||
| South Danby | PO | Danby twp, Tompkins Co, NY | ||
| South Dansville | PO | Dansville twp, Steuben Co, NY | ||
| South Dartmouth | PO | Dartmouth twp, Bristol Co, MS | ||
| South Dedham | PO | Norfolk Co, MS | ||
| South Deerfield | PV | Deerfield twp, Rockingham Co, NH | ||
| South Deerfield | PV | Deerfield twp, Franklin Co, MA | ||
| South Deer Isle | PV | Hancock Co, ME | ||
| South Dennis | PO | Dennis twp, Barnstable Co, MA | ||
| South Dickinson | PO | Dickinson twp, Franklin Co, NY | ||
| South Dorset | PO | Bennington Co, VT | ||
| South Dover | PO | Dover twp, Piscatquis Co, ME | ||
| South Dover | PO | Dover twp, Dutchess Co, NY | ||
| South Dresden | PO | Lincoln Co, ME | ||
| South Durham | PO | Durham twp, Greene Co, NY | ||
| South Durham | PO | Durham twp, Cumberland Co, ME | ||
| South East | PT | Putnam Co, NY | 2,079 | water by Croton river |
| South East | PT | Orange Co, IN | ||
| South Easton | PO | Easton twp, Washington Co, NY | ||
| South Easton | B | Northampton Co, PA | 1,511 | water by Lehigh river |
| South Easton | PO | Bristol Co, MA | ||
| South Edmeston | PO | Edmeston twp, Otsego Co, NY | ||
| South Edwards | PO | Edwards twp, St Lawrence Co, NY | ||
| South Egremont | PV | Egremont twp, Berkshire Co, MA | ||
| South English | PO | Keokuk Co, IA | ||
| South Erin | PO | Chemung Co, NY | ||
| South Farms | PV | Litchfield twp, Litchfield Co, CT | ||
| South Florence | PV | Franklin Co, AL | water by Tennessee river | |
| South Fork | T | Izard Co, AR | ||
| South Fork | PO | Owsley Co, KY | ||
| South Fork | PO | Wayne Co, IA | ||
| South Fork | PO | Ashe Co, NC | ||
| South Fort | T | Monroe Co, MO | ||
| South Foster | PO | Foster twp, Providence Co, RI | ||
| South Framingham | PO | Framingham twp, Middlesex Co, MA | ||
| South Franklin | PO | Franklin twp, Delaware Co, NY | ||
| South Franklin | PO | Norfolk Co, MA | ||
| South Freedom | PO | Freedom twp, Waldo Co, ME | ||
| South Galway | PO | Saratoga Co, NY | ||
| South Gardner | PO | Gardner twp, Worcester Co, MA | ||
| South Gate | PO | Franklin Co, IN | ||
| South Genesee | PO | Waukesha Co, WI | ||
| South Gibson | PO | Gibson Co, TN | ||
| South Gilboa | PO | Schoharie Co, NY | ||
| South Glastonbury | PV | Glastonbury twp, Hartford Co, CT | water by Connecticut river | |
| South Garnby | PO | Oswego Co, NY | ||
| South Granville | PO | Granville twp, Washington Co, NY | ||
| South Groton | PO | Middlesex Co, MA | ||
| South Grove | PO | De Kalb Co, IL | ||
| South Grove | PO | Walworth Co, WI | ||