1850 Atlas
| Name | What | Place | Pop | Other |
| Flackville | PO | St Lawrence Co, NY | ||
| Flagg Spring | PO | Campbell Co, KY | ||
| Flaggtown | PV | Hillsborough twp, Somerset Co, NJ | ||
| Flag Pond | PO | Washington Co, TN | ||
| Flag Staff | PO | Somerset Co, ME | ||
| Flanders | PV | South Hampton twp, Suffolk Co, NY | water by Little Peconic | |
| Flat | PO | Pike Co, OH | ||
| Flatberg | PO | Irwin Co, GA | ||
| Flat Brook | PO | Columbia Co, NY | ||
| Flat Brookville | PO | Sandystone twp, Sussex Co, NJ | ||
| Flatbush | PT | King's Co, NY | 3,176 | |
| Flat Creek | PO | Montgomery Co, NY | ||
| Flat Creek | PO | Lowndes Co, GA | ||
| Flat Creek | PO | Bedford Co, TN | ||
| Flat Creek | PO | Buncombe Co, NC | ||
| Flat Creek | T | Taney Co, MO | ||
| Flat Creek | T | Pettis Co, MO | ||
| Flat Creek Mills | PO | Campbell Co, VA | ||
| Flat Lands | PT | King's Co, NY | 1,155 | water byJamaica bay |
| Flat Lick | PO | Claiborne parish, LA | ||
| Flat Lick | PO | Knox Co, KY | ||
| Flat River | PO | Kent Co, MI | ||
| Flat Rock | PT | Bartholomew Co, IN | 725 | |
| Flat Rock | PO | Henry Co, GA | ||
| Flat Rock | PO | Powhattan Co, VA | ||
| Flat Rock | PO | Henderson Co, NC | ||
| Flat Rock | PO | Bourbon Co, KY | ||
| Flat Rock | T | Henry Co, OH | 406 | |
| Flat Rock | PV | Shelby Co, IN | water by Flat Rock creek | |
| Flat Rock | PO | Cape Girardeau Co, MO | ||
| Flat Rock | PO | Seneca Co, OH | ||
| Flat Rock | PO | Kershaw dist, SC | ||
| Flat Rock | PO | Crawford Co, IL | ||
| Flat Shoals | PO | Meriwether Co, GA | ||
| Flat Woods | PO | Baxton Co, VA | ||
| Flat Woods | PO | Fayette Co, PA | ||
| Flat Woods | PO | Izard Co, AR | ||
| Fleetville | PV | Luzerne Co, PA | ||
| Fleetwood Academy | PO | King and Queen Co, VA | ||
| Fleming | PT | Cayuga Co, NY | 1,193 | water by Crane brook & Owasco lake |
| Fleming | PO | Livingston Co, MI | ||
| Fleming | PO | Centre Co, PA | ||
| Fleming | PO | Weakley Co, TN | ||
| Flemingsburgh | PV, CH | Fleming Co, KY | seat of justice, water by Stockton run | |
| Flemingsville | PO | Owego twp, Tioga Co, NY | ||
| Flemington | PV, CH | Raritan twp, Hunterdon Co, NJ | seat of justice | |
| Flemington | PV | Wake Co, NC | ||
| Flemington | PO | Marion Co, FL | ||
| Fletcher | PT | Franklin Co, VT | 1,084 | water by Lamoille & Fiarfield rivers & Stone's brook |
| Fletcher | PV | Brown twp, Miami Co, OH | 246 | |
| Flewillin's Cross Roads | PO | De Soto Co, MS | ||
| Flicksville | PV | Northampton Co, PA | ||
| Flint | PT | Genesee Co, MI | 3,304 | |
| Flint | PO | Cherokee Nation Co, AR | ||
| Flint | PO | Steuben Co, IN | ||
| Flint Creek | PO | Seneca twp, Ontario Co, NY | ||
| Flint Creek | PO | Harrison Co, MS | ||
| Flint Creek | PO | Lake Co, IL | ||
| Flint Gap | PO | Knox Co, TN | ||
| Flint Hill | PO | Rappahannock Co, VA | ||
| Flint Hill | PO | St Charles Co, MO | ||
| Flint Island | PO | Mead Co, KY | ||
| Flint Ridge | PO | Lancaster dist, SC | ||
| Flint Rock | PO | Catawba Co, NC | ||
| Flint's Mills | PO | Washington Co, OH | ||
| Flint Spring | PO | Bradley Co, TN | ||
| Flintville | PV | Marion dist, SC | ||
| Flippos | PO | Caroline Co, VA | ||
| Flora | PO | Smith Co, TX | ||
| Florence | PV | Washington Co, PA | ||
| Florence | PT | St Joseph Co, MI | 731 | |
| Florence | PT | Oneida Co, NY | 2,575 | water by tributaries of Fish creek |
| Florence | PV | Stewart Co, GA | water by Chattahoochee river | |
| Florence | PV, CH | Lauderdale Co, AL | seat of justice, water by Tennessee river | |
| Florence | PT | Boone CO, KY | ||
| Florence | PT | Erie Co, OH | ||
| Florence | T | Williams Co, OH | 669 | |
| Florence | V | Louisa Co, IA | 766 | water by Iowa river |
| Florence | PO | Fremont Co, IA | ||
| Florence | PO | Switzerland Co, IN | ||
| Florence | PV | Morgan Co, MO | water by south fork of La Mine river | |
| Florence | PV | Pike Co, IL | ||
| Florid | PO | Putnam Co, IL | ||
| Florida | PT | Hillsdale Co, MI | ||
| Florida | PT | Berkshire Co, MA | 561 | water by Cold river |
| Florida | PV | Warwick twp, Orange Co, NY | ||
| Florida | T | Montgomery Co, NY | 3,571 | water by Mohawk river |
| Florida | PV | Monroe Co, MO | water by south fork of Salt river | |
| Florida | PO | Henry Co, OH | ||
| Floris | PO | Davis Co, IA | ||
| Florisant | PO | St Louis Co, MO | ||
| Flournoys | PO | Nacogdoches Co, TX | ||
| Flower Creek | PO | Pendleton Co, KY | ||
| Flowerfield | PB | St Joseph Co, MI | 564 | |
| Flowery Mound | PO | Concordia parish, LA | ||
| Floyd | PT | Oneida Co, NY | 1,495 | water by Mohawk river & Nine Mile creek |
| Floyd | PO, CH | Floyd Co, VA | Jacksonville village seat of justice | |
| Floyd | T | Putnam Co, IN | ||
| Floydsburgh | PV | Oldham Co, KY | water by Floyd's creek | |
| Floyd's Mills | PO | Horry dist, SC | ||
| Fluke's | PO | Botetourt Co, VA | ||
| Flume | PO | Grafton Co, NH | ||
| Flushing | PT | Queen's Co, Long Island, NY | 5,376 | water by Long Island sound, Flushing & Little Neck bays |
| Flushing | PT | Belmont Co, OH | 1,486 | water by Stillwater creek |
| Flushing | PT | Genesee Co, MI | 708 | |
| Fluvanna | PO | Elliott twp, Chautauque Co, NY | ||
| Fly Creek | PO | La Grange Co, IN | ||
| Fly Creek | PO | Otsogo Co, NY | ||
| Fly Mountain | PO | Ulster Co, NY | ||
| Flynn's Lick | PO | Jackson Co, TN | ||
| Focht's Forge | PO | Schuylkill Co, PA | ||
| Foglesville | PO | Macungy twp, Lehigh Co, PA | ||
| Fogo | PO | Allegan Co, MI | ||
| Fonda | PV, CH | Mohawk twp, Montgomery Co, NY | 3,571 | seat of justice, water by Mohawk river |
| Fond Du Lac | PV, CH | Fond Du Lac Co, WI | seat of justice, water by Lake Winnebago | |
| Forbush | PO | Surry Co, NC | ||
| Ford | PO | Geauga Co, OH | ||
| Fordham | PV | Westchester twp, Westchester Co, NY | ||
| Ford's Store | PO | Franklin Co, GA | ||
| Fordsville | PV | Marion Co, MS | ||
| Fordsville | PO | Ohio Co, KY | ||
| Forestburgh | PB | Sullivan Co, NY | 715 | water by Navesink river |
| Forest City | PO | Tompkins Co, NY | ||
| Forest Dale | PO | Rutland Co, VT | ||
| Forest Hill | PO | Decatur Co, IN | ||
| Forest Hill | PO | Union Co, PA | ||
| Forest Home | PO | Cass Co, TX | ||
| Forest Lake | PT | Susquehannah Co, PA | 780 | |
| Forest Oak | PO | Montgomery Co, MD | ||
| Forest Retgreat | PO | Nicholas Co, KY | ||
| Forestville | PV | Wake Co, NC | ||
| Forestville | PO | Hartford Co, CT | ||
| Forestville | PO | Otsego Co, NY | ||
| Forge Village | PV | Middlesex Co, MA | ||
| Forked River | PO | Monmouth Co, NJ | ||
| Fork Inn | PO | Dinwiddle Co, VA | ||
| Forkland | PO | Greene Co, AL | ||
| Fork Meeting House | PO | Baltimore Co, MD | ||
| Fork Ridge | PO | Marshall Co, VA | ||
| Forks | T | Lycoming Co, PA | ||
| Forks | T | Northampton Co, PA | water by Bushkill creek | |
| Forks of Buffalo | PO | Marion Co, VA | ||
| Forks of Elkhorn | PO | Franklin Co, KY | ||
| Forks of Pigeon | PO | Haywood Co, NC | ||
| Forks of Potomac | PO | Hampshire Co, VA | ||
| Forkston | PO | Wyoming Co, PA | ||
| Forksville | PO | Mecklenburgh Co, VA | ||
| Forksville | PO | Lake Co, IL | ||
| Forksville | PO | Washita parish, LA | ||
| Forktown | PV | Somerset Co, MD | ||
| Fork Union | PO | Fluvanna Co, VA | ||
| Forney's | PO | Lincoln Co, NC | ||
| Forsyth | PV, CH | Monroe Co, GA | seat of justice, water by Towelaggee & Ocmulgee rivers | |
| Forsyth | PV, CH | Taney Co, MO | seat of justice, water by White river & Swan Creek |