1850 Atlas
| Name | What | Place | Pop | Other |
| Mier | PO | Grant Co, IN | ||
| Mier | PO | Wabash Co, IL | ||
| Mier | PO | Madison Co, MO | ||
| Mifflin | T | Lycoming Co, PA | 1,186 | |
| Mifflin | T | Alleghany Co, PA | 2,693 | water by Thompson's & Strut's runs, Peter's creek |
| Mifflin | T | Cumberland Co, PA | 1,574 | water by Conedogwinit creek |
| Mifflin | T | Columbia Co, PA | 1,024 | |
| Mifflin | T | Dauphin Co, PA | 1,302 | water by Wiconisco creek |
| Mifflin | PT | Ashland Co, OH | 891 | |
| Mifflin | T | Franklin Co, OH | 1,095 | |
| Mifflin | T | Crawford Co, OH | ||
| Mifflin | T | Pike Co, OH | 546 | |
| Mifflin | PV | Henderson Co, TN | ||
| Mifflin | PO | Iowa Co, WI | ||
| Mifflin | PO | Crawford Co, IN | ||
| Mifflinburgh | PB | Buffalo two, Union Co, PA | 783 | water by Buffalo creek |
| Mifflintown | PB, CH | Fermaugh twp, Juniata Co, PA | 485 | seat of justice, water by Juniata river & Pennsylvania canal |
| Mifflinville | PV | Columbia Co, PA | water by Susquehanna river | |
| Milam | PO | Sabine Co, TX | ||
| Milan | PT | Coos Co, NH | 493 | water by Androscoggin river & tributary of Upper Ammonoosuc river |
| Milan | PT | Dutchess Co, NY | 1,764 | water by Sawkill creek and a tributary of Roeliff Jansen's creek |
| Milan | PO | Bradford Co, PA | ||
| Milan | PT | Erie Co, OH | 2,697 | water by Huron river |
| Milan | PT | Monroe Co, MI | 442 | water by Saline & Macon rivers |
| Milan | T | Allen Co, IN | 361 | |
| Milan | T | Calhoun Co, IL | ||
| Milan | PO | Sullivan Co, MO | ||
| Milburgh | PO | Greenville dist, SC | ||
| Milbury | PT | Worcester Co, MA | water by Blackstone river & canal | |
| Miles | PT | Centre Co, PA | ||
| Milestown | PV | Bristol twp, Philadelphia Co, PA | ||
| Milestown | PO | St Mary's Co, MD | ||
| Milford | PT | Penobscot Co, ME | 687 | water by Penobscot & Sunkhaze rivers |
| Milford | PT | Hillsborough Co, NH | 2,159 | water by Souegan river |
| Milford | PT | Worcester Co, MA | 4,819 | water by Charles & Mill rivers |
| Milford | PT | New Haven Co, CT | 2,465 | water by Wepawaug & Housatonic rivers |
| Milford | PT | Otsego Co, NY | 2,227 | water by Susquehanna river |
| Milford | PV | Alexandria twp, Hunterdon Co, NJ | water by Delaware river | |
| Milford | PT, CH | Pike Co, PA | 830 | seat of justice, water by Delaware river |
| Milford | PT | Bucks Co, PA | 2,527 | water by Swamp river |
| Milford | PT | Juniata Co, PA | 1,094 | water by Juniata river |
| Milford | PT | Somerset Co, PA | 2,070 | water by Castleman's river & Laurel Hill creek |
| Milford | PO | Caroline Co, PA | ||
| Milford | PO | Pike Co, PA | ||
| Milford hundred | PV | Kent Co, DE | water by Mispillon creek | |
| Milford | PV | Greenville dist, SC | ||
| Milford | PV | Bracken Co, KY | water by branch of Licking creek | |
| Milford | PV | Miami twp, Clermont Co, OH | water by Little Miami river | |
| Milford | T | Butler Co, OH | 2,068 | |
| Milford | PT | Knox Co, OH | 1,349 | |
| Milford | PT | Oakland Co, MI | 1,470 | |
| Milford | T | Williams Co, OH | 1,282 | |
| Milford | PO | Kosciusko Co, IN | ||
| Milford | T | La Grande Co, IN | 806 | |
| Milford | PO | Iroquois Co, IL | ||
| Milford | PO | Jefferson Co, WI | ||
| Milford | PO | Hunterdon Co, NJ | ||
| Milford Centre | PO | Union twp, Union Co, OH | ||
| Milfordton | PO | Knox Co, OH | ||
| Military Grove | PO | McDowell Co, NC | ||
| Military Institute | PO | Franklin Co, KY | ||
| Military Road | PO | Theresa twp, Jefferson Co, NY | ||
| Military Springs | PO | Fayette Co, AL |