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All Counties of the American Old West with a Map

With the help of a map, can you name every U.S. county of the Wild West that existed in 1880?
Click on the map to zoom in.
According to MapofUS.org.
Boundaries defined as being west of the 100th meridian.
Quiz by
Dekkie
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Last updated: September 29, 2025
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First submittedSeptember 29, 2025
Times taken238
Average score19.1%
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Arizona
 
Apache
 
Maricopa
 
Mohave
 
Pima
 
Pinal
 
Yavapai
 
Yuma
 
 
 
California
 
Alameda
 
Alpine
 
Amador
 
Butte
 
Calaveras
 
Colusa
 
Contra Costa
 
Del Norte
 
El Dorado
 
Fresno
 
Humboldt
 
Inyo
 
Kern
 
Lake
 
Lassen
 
Los Angeles
 
Marin
 
Mariposa
 
Mendocino
 
Merced
 
Modoc
 
Mono
 
Monterey
 
Napa
 
Nevada
 
Placer
 
Plumas
 
Sacramento
 
San Benito
 
San Bernardino
 
San Diego
 
San Francisco
 
San Joaquin
 
San Luis Obispo
 
San Mateo
 
Santa Barbara
 
Santa Clara
 
Santa Cruz
 
Shasta
 
Sierra
 
Siskiyou
 
Solano
 
Sonoma
 
Stanislaus
 
Sutter
 
Tehama
 
Trinity
 
Tulare
 
Tuolumne
 
Ventura
 
Yolo
 
Yuba
Colorado
Arapahoe
Bent
Boulder
Chaffee
Clear Creek
Conejos
Costilla
Custer
Douglas
El Paso
Elbert
Fremont
Gilpin
Grand
Gunnison
Hinsdale
Huerfano
Jefferson
La Plata
Lake
Larimer
Las Animas
Ouray
Park
Pueblo
Rio Grande
Routt
Saguache
San Juan
Summit
Weld
 
Dakota
Billings
Boreman
Botineau
Burleigh
Campbell
Cheyenne
Custer
De Smet
Delano
Emmons
Forsythe
Gingras
Howard
Hughes
Lawrence
Lugenbeel
Mandan
McHenry
Mercer
Meyer
Morton
Mountraille
Pennington
Potter
Pratt
Presho
Renville
Rolette
Rusk
Shannon
Sheridan
Stanley
Stark
Stevens
Sully
Tripp
Wallette
Walworth
White River
Williams
Ziebach
Idaho
Ada
Alturas
Bear Lake
Boise
Cassia
Idaho
Kootenai
Lemhi
Nez Perce
Oneida
Owyhee
Shoshone
Washington
 
Kansas
Arapahoe
Buffalo
Cheyenne
Clark
Decatur
Foote
Ford
Gove
Graham
Grant
Greeley
Hamilton
Hodgeman
Kansas
Kearney
Lane
Meade
Ness
Norton
Rawlins
Scott
Sequoyah
Seward
Sheridan
Sherman
Stanton
Stevens
Thomas
Trego
Wallace
Wichita
 
Montana
Beaverhead
Choteau
Custer
Dawson
Deer Lodge
Gallatin
Jefferson
Lewis and Clark
Madison
Meagher
Missoula
Nebraska
Chase
Cheyenne
Custer
Dawson
Dundy
Frontier
Furnas
Gosper
Hayes
Hitchcock
Keith
Lincoln
Red Willow
Sioux
 
Nevada
Churchill
Douglas
Elko
Esmeralda
Eureka
Humboldt
Lander
Lincoln
Lyon
Nye
Ormsby
Roop
Storey
Washoe
White Pine
 
New Mexico
Bernalillo
Colfax
Doña Ana
Grant
Lincoln
Mora
Rio Arriba
San Miguel
Santa Fe
Socorro
Taos
Valencia
 
Oregon
Baker
Benton
Clackamas
Clatsop
Columbia
Coos
Curry
Douglas
Grant
Jackson
Josephine
Lake
Lane
Linn
Marion
Multnomah
Polk
Tillamook
Umatilla
Union
Wasco
Washington
Yamhill
Texas
Andrews
Armstrong
Bailey
Borden
Briscoe
Carson
Castro
Childress
Cochran
Collingsworth
Concho
Cottle
Crockett
Crosby
Dallam
Dawson
Deaf Smith
Dickens
Dimmit
Donley
Edwards
El Paso
Fisher
Floyd
Gaines
Gray
Garza
Hale
Hall
Hansford
Hartley
Hemphill
Hockley
Howard
Hutchinson
Jones
Kent
Kimble
King
Kinney
Lamb
Lipscomb
Lubbock
Lynn
Martin
Maverick
Menard
Mitchell
Moore
Motley
Nolan
Ochiltree
Oldham
Parmer
Pecos
Potter
Presidio
Randall
Roberts
Runnels
Scurry
Sherman
Stonewall
Swisher
Taylor
Terry
Tom Green
Uvalde
Webb
Wheeler
Yoakum
Zavala
Utah
Beaver
Box Elder
Cache
Davis
Emery
Iron
Juab
Kane
Millard
Morgan
Piute
Rich
Salt Lake
San Juan
Sanpete
Sevier
Summit
Tooele
Uintah
Utah
Wasatch
Washington
Weber
 
Washington
Chehalis
Clallam
Clark
Columbia
Cowlitz
Island
Jefferson
King
Kitsap
Klickitat
Lewis
Mason
Pacific
Pierce
San Juan
Skamania
Snohomish
Spokane
Stevens
Thurston
Wahkiakum
Walla Walla
Whatcom
Whitman
Yakima
 
Wyoming
Albany
Carbon
Crook
Johnson
Laramie
Sweetwater
Uinta
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7 Comments
+2
Level 52
Sep 29, 2025
wyoming seems so ugly, bruh
+2
Level 55
Sep 29, 2025
It really does just look off.
+3
Level 81
Sep 29, 2025
Nice quiz. A lot of it is just guessing which modern counties existed back then.
+2
Level 81
Sep 29, 2025
Also, Douglas County, NV is marked as just Doug.
+1
Level 55
Sep 29, 2025
Thanks! Fixed.
+1
Level 81
Sep 29, 2025
I also realized that Gray County, TX is listed as Gary. There might be a few others.
+2
Level 55
Sep 29, 2025
There's at least one whose spelling was slightly different: Kearny County in Kansas, which was spelled as Kearney County back then.