1850 Atlas
| Name | What | Place | Pop | Other |
| Milo | PT | Piscataquis Co, ME | 932 | water by Piscataquis & Pleasant rivers |
| Milo | PT | Yates Co, NY | 4,791 | water by Crooked lake outlet |
| Milo | PO | Brown Co, IN | ||
| Milo | PO | Bureau Co, IL | ||
| Milo | PO | Bradley Co, AR | ||
| Milo | PO | Defiance Co, OH | ||
| Milo Centre | PV | Milo twp, Yates Co, NY | ||
| Milroy | PV | Rush Co, IN | ||
| Milroy | PO | Mifflin Co, PA | ||
| Milton | T | Piscataquis Co, ME | 932 | |
| Milton | PT | Strafford Co, NH | 1,629 | water by Salmon Fall river |
| Milton | PT | Chittenden Co, VT | 2,451 | water by Lamoille river & Lake Champlain |
| Milton | PT | Norfolk Co, MA | 2,241 | water by Neponset river |
| Milton | PV | Litchfield twp, Litchfield Co, CT | water by Shepaug river | |
| Milton | T | Saratoga Co, NY | 4,220 | water by Kayaderosseras creek |
| Milton | PV | Marlborough twp, Ulster Co, NY | water by Hudson river | |
| Milton | PV | Morris Co, NJ | ||
| Milton | PB | Turbot twp, Northumberland Co, PA | 1,649 | water by west branch of Susquehanna river & Limestone run |
| Milton | PV | Sussex Co, DE | ||
| Milton | PV | Caswell Co, NC | ||
| Milton | PV | Laurens dist, SC | ||
| Milton | PV | Outauga Co, AL | ||
| Milton | PV | Santa Rosa Co, FL | seat of justice, water by Blackwater river | |
| Milton | PV | Rutherford Co, TN | ||
| Milton | PV | Trimble Co, MY | water by Ohio river | |
| Milton | PT | Mahoning Co, OH | 1,123 | water by Mahoning river |
| Milton | T | Jackson Co, OH | 1,472 | |
| Milton | T | Miami Co, OH | 398 | |
| Milton | T | Richland Co, OH | 1,106 | |
| Milton | T | Wayne Co, OH | 1,360 | |
| Milton | T | Wood Co, OH | 244 | |
| Milton | PT | Jefferson Co, IN | 1,544 | |
| Milton | PT | Wayne Co, IN | 765 | |
| Milton | PO | Pike Co, IL | ||
| Milton | PO | Rock Co, WI | ||
| Milton | PO | Lafayette Co, MS | ||
| Milton | PO | Randolph Co, MO | ||
| Milton | T | Cass Co, MI | 611 | |
| Milton | PO | Wilkinson Co, GA | ||
| Milton Mills | PO | Milton twp, Strafford Co, NH | ||
| Miltonsburgh | PO | Monroe Co, OH | ||
| Miltonville | PV | Middletown twp, Wood Co, OH | ||
| Miltonville | V | Madison twp, Butler Co, OH | ||
| Milville | PO | Rusk Co, TX | ||
| Milwaukee | City | Milwaukee Co, WI | 20,026 | on Lake Michigan |
| Mina | PT | Chautauque Co, NY | 996 | water by French creek & Finley's lake |
| Minaville | PO | Florida twp, Montgomery Co, NY | ||
| Minden | PT | Montgomery Co, NY | 4,633 | water by Mohawk river & Otsquake creek |
| Minden | PV, CH | Claiborne parish, LA | seat of justice | |
| Mindenville | PO | Minden twp, Montgomery Co, NY | ||
| Mindora | PO | La Cross Co, WI | ||
| Mine-A-Breton | PT | Washington Co, MO | ||
| Mine Creek | PT | Hempstead Co, AR | 1,185 | |
| Mine Kill Falls | PO | Schoharie Co, NY | ||
| Mine La Motte | PO | Madison Co, MO | ||
| Mineral Point | PV, CH | Iowa Co, WI | seat of justice, water by Pickatonokee river | |
| Mineral Spring | PO | Columbia Co, FL | ||
| Mineral Spring | PO | Anderson dist, SC | ||
| Mineral Springs | PO | Lowndes Co, GA | ||
| Minersville | PV | McDowell Co, NC | ||
| Minersville | PV | Norwegian twp, Schuylkill Co, PA | 2,951 | |
| Minersville | V | Alleghany Co, PA | ||
| Minersville | PV | Meigs Co, OH | ||
| Minerva | PT | Essex Co, NY | 586 | water by Hudson river |
| Minerva | PV | Mason Co, KY | ||
| Minerva | PV | Paris twp, Stark Co, OH | on the Sandy & Beaver canal | |
| Minerva | PO | Houston Co, GA | ||
| Minetto | PO | Oswego Co, NY | ||
| Mingo Flat | PO | Randolph Co, VA | ||
| Minisink | PT | Orange Co, NY | 4,972 | water by Wall Kill |
| Mino | T | Mifflin Co, PA | 1,020 | |
| Minot | PT | Cumberland Co, ME | 1,734 | water by Androscoggin & Little Androscoggin rivers |
| Minster | PO | Mercer Co, OH | ||
| Mintonsville | PV | Gates Co, NC | ||
| Mintonville | PO | Casey Co, KY | ||
| Mint Spring | PO | Augusta Co, VA | ||
| Mirabille | PO | Caldwell Co, MO | ||
| Miranda | PV | Rowan Co, NC | ||
| Mirickville | PO | Bristol Co, MA | ||
| Mishawaka | PV | St Joseph Co, IN | ||
| Mispillon hundred | not listed | Kent Co, DE | ||
| Misson Point | PO | La Salle Co, IL | ||
| Misson San Jose | PO | Contra Costa Co, CA | ||
| Missionary Station | PO | Floyd Co, GA | water by Coosa river | |
| Mississinawa | PT | Darke Co, OH | 378 | |
| Mississippi | T | Scott Co, MO | ||
| Mississippi City | PV | Harrison Co, MS | seat of justice, water by Gulf of Mexico | |
| Missouri | T | Boone Co, MO | ||
| Missouri | T | Scott Co, MO | ||
| Missouri | PV | Pike Co, AL | ||
| Missouri | T | Wachita Co, AR | 730 | |
| Missouri | T | Hempstead Co, AR | 513 | |
| Missouriton | PV | St Charles Co, MO | water by Missouri river | |
| Mitchell | T | Poinsett Co, AR | 760 | |
| Mitchell | PO | Sheboygan Co, WI | ||
| Mitchell's | PO | Walker Co, TX | ||
| Mitchell's Mills | PO | Indiana Co, PA | ||
| Mitchell's Salt Works | PO | Jefferson Co, OH | ||
| Mitchellsville | PV | Robertson Co, TN | ||
| Mitchellsville | PO | Boone Co, KY | ||
| Mittineague | PO | Hampden Co, MA | ||
| Mixerville | PO | Franklin Co, | ||
| Mixtown | PO | Tioga Co, PA | ||
| Mixville | PV | Haine twp, Alleghany Co, NY | water by West Kog creek |