1850 Atlas
| Name | What | Place | Pop | Other |
| Washington | PT | Lincoln Co, ME | 1,756 | water by tributaries of Damariscotta & Muscongus rivers |
| Washington | PT | Sullivan Co, NH | 1,053 | water by head waters of Ashuelot & Contoocook rivers |
| Washington | PT | Orange Co, VT | 1,348 | water by Jail branch of Winooski river, tributaries of Wait's & White rivers |
| Washington | PT | Berkshire Co, MA | 953 | water by tributaries of Westfield & Housatonick rivers |
| Washington | PT | Litchfield Co, CT | 1,802 | water by Shepaug river |
| Washington | PT | Dutchess Co, NY | 2,805 | water by Wappinger's creek |
| Washington | T | Bergen Co, NJ | 1,804 | water by Hackensack & Sadler rivers |
| Washington | T | Burlington Co, NJ | 2,009 | water by Little Egg Harbor river |
| Washington | T | Camden Co, NJ | 2,114 | |
| Washington | PT | Morris Co, NJ | 2,502 | water by south branch of Raritan river |
| Washington | PB, CH | Washington Co, PA | 2,662 | seat of justice, seat of Washington College |
| Washington | T | Greene Co, PA | 914 | |
| Washington | T | Lycoming Co, PA | 2,138 | |
| Washington | T | Berks Co, PA | 1,154 | |
| Washington | T | Franklin Co, PA | 2,471 | water by tributaries of Antictam creek |
| Washington | T | York Co, PA | 1,339 | |
| Washington | T | Fayette Co, PA | 1,276 | |
| Washington | T | Cambria Co, PA | 1,691 | water by tributaries of Kiskiminetas creek |
| Washington | T | Erie Co, PA | 1,706 | water by head waters of French creek |
| Washington | T | Greene Co, PA | 914 | water by tributaries of Ten Mile creek |
| Washington | T | Indiana Co, PA | 1,111 | water by Crooked & Plum creeks |
| Washington | T | Clarion Co, PA | 1,227 | |
| Washington | T | Westmoreland Co, PA | 2,076 | water by White Deer Hole & Black Hole creeks |
| Washington | PV | Rappahannock Co, VA | ||
| Washington | PV, CH | Beaufort Co, NC | seat of justice, water by Tar & Pamplico rivers | |
| Washington | PV, CH | Wilkes Co, GA | seat of justice, water by Kettle creek | |
| Washington | PV, CH | Adams Co, MS | seat of justice, seat of Jefferson college | |
| Washington | PV | St Landre parish, LA | water by Cortebleau bayou | |
| Washington | PV, CH | Rhea Co, TN | seat of justice, water by Tennessee river | |
| Washington | PV, CH | Mason Co, KY | seat of justice | |
| Washington | PV, CH | Fayette Co, OH | 470 | seat of justice |
| Washington | PT | Guernsey Co, OH | 972 | |
| Washington | T | Auglaize Co, OH | 688 | |
| Washington | T | Belmont Co, OH | 1,532 | water by Ohio river |
| Washington | T | Brown Co, OH | 987 | |
| Washington | T | Carroll Co, OH | 1,020 | |
| Washington | T | Clermont Co, OH | 2,540 | water by Ohio river |
| Washington | T | Clinton Co, OH | 1,216 | |
| Washington | T | Coshocton Co, OH | 998 | |
| Washington | T | Columbiana Co, OH | 965 | |
| Washington | T | Darke Co, OH | 1,250 | |
| Washington | T | Franklin Co, OH | 1,270 | water by Scioto river |
| Washington | T | Hancock Co, OH | 1,222 | |
| Washington | T | Hardin Co, OH | 391 | |
| Washington | T | Harrison Co, OH | 1,255 | |
| Washington | T | Hocking Co, OH | 1,640 | |
| Washington | T | Holmes Co, OH | 1,468 | |
| Washington | T | Jackson Co, OH | 756 | |
| Washington | T | Licking Co, OH | 1,361 | |
| Washington | T | Logan Co, OH | 668 | |
| Washington | T | Miami Co, OH | 981 | |
| Washington | T | Mercer Co, OH | 456 | |
| Washington | T | Monroe Co, OH | 865 | |
| Washington | T | Montgomery Co, OH | 1,825 | |
| Washington | T | Muskingum Co, OH | 1,335 | |
| Washington | T | Pickaway Co, OH | 1,099 | |
| Washington | T | Preble Co, OH | 714 | |
| Washington | T | Richland Co, OH | 1,914 | |
| Washington | T | Sandusky Co, OH | 1,499 | |
| Washington | T | Scioto Co, OH | 706 | water by Ohio & Scioto rivers, Ohio canal |
| Washington | T | Shelby Co, OH | 1,261 | water by tributary of Miami river |
| Washington | T | Stark Co, OH | 2,066 | |
| Washington | T | Tuscarawas Co, OH | 1,091 | |
| Washington | T | Union Co, OH | 333 | |
| Washington | T | Van Wert Co, OH | 355 | |
| Washington | T | Warren Co, OH | 1,566 | |
| Washington | T | Williams Co, OH | ||
| Washington | T | Wood Co, OH | 504 | |
| Washington | T | Blackford Co, IN | 470 | |
| Washington | not listed | Brown Co, IN | 1,249 | |
| Washington | T | Clark Co, IN | 1,101 | |
| Washington | PT, CH | Davies Co, IN | 2,578 | seat of justice |
| Washington | T | Gibson Co, IN | 754 | |
| Washington | T | Grant Co, IN | 1,007 | |
| Washington | T | Hamilton Co, IN | 1,840 | |
| Washington | T | Harrison Co, IN | ||
| Washington | T | Marion Co, IN | 2,043 | |
| Washington | T | Noble Co, IN | 645 | |
| Washington | T | Putnam Co, IN | 2,129 | |
| Washington | T | Randolph Co, IN | ||
| Washington | T | Rush Co, IN | 1,075 | |
| Washington | T | Tippecanoe Co, IN | 861 | |
| Washington | T | Washington Co, IN | 3,322 | |
| Washington | T | Wayne Co, IN | 1,540 | |
| Washington | PT | Macomb Co, MI | 1,541 | water by Stony creek |
| Washington | PV | Tazewell Co, IL | ||
| Washington | PV, CH | Washington Co, IA | 327 | seat of justice |
| Washington | PV | Franklin Co, MO | ||
| Washington | T | Buchanan Co, MO | 4,301 | |
| Washington | T | Clark Co, MO | ||
| Washington | T | Johnson Co, MO | ||
| Washington | T | Lafayette Co, MO | 1,641 | |
| Washington | T | Livingston Co, MO | ||
| Washington | T | Osage Co, MO | 1,093 | |
| Washington | T | Polk Co, MO | ||
| Washington | T | Taney Co, MO | ||
| Washington | PV, CH | Hempstead Co, AR | seat of justice, water by tributary of Red river | |
| Washington | T | Independence Co, AR | ||
| Washington | T | Sevier Co, AR | ||
| Washington | PO | Washington Co, TX | ||
| Washington College | PO | Washington Co, TN | ||
| Washington Hollow | PO | Washington twp, Dutchess Co, NY | ||
| Washington Mills | PO | Oneida Co, NY | ||
| Washingtonville | PO | Sandy Creek twp, Oswego Co, NY | ||
| Washingtonville | V | Blooming Grove twp, Orange Co, NY | ||
| Washingtonville | PV | Derry twp, Montour Co, PA | ||
| Washingtonville | PV | Greene twp, Columbiana Co, OH | ||
| Washingtonville | PO | Baltimore Co, MD | ||
| Washita | PO | Grayson Co, MD | ||
| Wassaic | PO | Dutchess Co, NY | ||
| Wassonville | PO | Washington Co, IA |