Old Historical City, County and State Maps of Idaho

Our collection of old historical maps of Idaho span over 100 years of growth. View Idaho Maps such as historical county boundaries changes, old vintage maps, as well as road / highway maps for all 44 counties in Idaho.

Maps of Idaho

Our collection of old historical Idaho maps span over 150 years of growth. Most historical maps of Idaho were published in atlases. The Idaho Territory was organized on March 3, 1863 and the State of Idaho was created as the 43rd state on July 3, 1890.

States bordering Georgia  are are Montana, Nevada, Oregon, Utah, Washington, Wyoming and Canada.

Several types of maps are useful for genealogists. Maps are essential in conducting on-site research, locating towns and cemeteries, and plotting mining claims. Several maps are available for Idaho that are helpful in conducting on-site or historical research.

Map of Idaho state with the counties and the county seats

Map of Idaho state with the counties and the county seats

The United States Geological Survey maps are available for Idaho. Major libraries in Idaho have been designated by the U.S. Geological Survey as map depository libraries. They include Boise State University in Boise, Albertsons LibraryUniversity of Idaho and Idaho State University.

Early Idaho atlas: Old gold mines, Indian battle grounds, old military roads, old forts, overland stage routes, early townsamazon is an excellent collection of early Idaho maps beginning with the 1804 Lewis and Clark trail map to a present-day map of the state.

The various maps detailing the history of Idaho are valuable for genealogical research as they show overland stage routes, old military roads, Indian battlegrounds, old forts, old mining areas, and early towns.

Solving Research Problems with a Idaho Maps – If you have started your family research, you might have experienced trouble with trying to identify Idaho city borders and names that have changed over the course of time. This can make it difficult to understand where your ancestors’ information is kept.

Because Idaho historic maps were usually commissioned by the county seat, they often display information about the county, including town names. Reading a Idaho map from the time period you are researching can help tremendously in solving these problems by leading you to the correct town records. It can also give you other leads, such as the location of city directories or old post offices in Idaho.

Choosing the Best Idaho Map – If you have a large source of maps to choose from, try starting with the area where your ancestors resided and looking for the maps with the most detail.  You can determine a lot by seeing if the area was still rural or more developed, and how far it was to the nearest city.  This can shed light on your family’s lifestyle and occupation. Were they farmers who lived in the country, or merchants who traveled often to a nearby city?  A map can give you an idea of what occupations were possible.

Map of Idaho County Formations 1848-1965

This Interactive Map of Idaho Counties show the historical boundaries, names, organization, and attachments of every county, extinct county and unsuccessful county proposal from the creation of Idaho in 1848-1965.

Idaho contains 44 counties.


Idaho County Formation Years

Idaho Map Abbreviations

  1. unorg. = unorganized
  2. g. = gained
  3. w. = with
  4. fr. = from
  5. atmt. = attachment
  6. exch = exchanged
  7. nca.= non county area
  8. ch. = changed
  9. Ada – Ada
  10. Adm – Adams
  11. Ba – Bannock
  12. Ben – Benewah
  13. Bi – Bingham
  1. BL – Bear Lake
  2. Bl – Blaine
  3. Bnr – Bonner
  4. Boi – Boise
  5. Bry – Boundary
  6. Bu – Butte
  7. Bvl – Bonneville
  8. Cam – Camas
  9. Can – Canyon
  10. Car – Caribou
  11. Cas – Cassia
  12. Clk – Clark
  13. Cu – Custer
  1. Cwr – Clearwater
  2. El – Elmore
  3. Fra – Franklin
  4. Fre – Fremont
  5. Gem – Gem
  6. Go – Gooding
  7. Id – Idaho
  8. Jef – Jefferson
  9. Jer – Jerome
  10. Ko – Kootenai
  11. Lat – Latah
  12. Lcn – Lincoln
  13. Lem – Lemhi
  1. Lew – Lewis
  2. Mad – Madison
  3. Mi – Minidoka
  4. NP – Nez Perce
  5. On – Oneida
  6. Ow – Owyhee
  7. Pa – Payette
  8. Po – Power
  9. Sh – Shoshone
  10. Te – Teton
  11. TF – Twin Falls
  12. Va – Valley
  13. Wtn – Washington

Old Historical Atlas Maps of Idaho

This Historical Idaho Map Collection are from original copies so you can see Idaho as our ancestors saw them over a hundred years ago.

Some Idaho map years (not all) have cities, railroads, P.O. locations, township outlines and other features useful to the Georgia researcher.

External Idaho Map Links

  • 1864 Map of Idaho, Oregon and Washington – by counties, with heavy outlines around the states. Shows towns, rivers, Indian reservations, roads, railroads, and forts clearly indicated and named. Includes the proposed route and line of the Pacific railroad.
  • 1874 Map of Idaho and Western Montana –  This map shows the the Western portion of Idaho and Montana. Counties of: Lodge, Lewis & Clark, Missoula, Deer, Jefferson, Meagher, Gallatin, Madison, Beaver Head, Lemhi, Idaho, Boise, Owyhee, Oneida, Alturas, Nez Perces, and Indian Reservations.
  • 1876 Idaho Map
  • 1880 Territory of Idaho Map
  • 1882 Idaho Map
  • 1883 Idaho Map
  • 1897 Idaho Map – This map shows waterways including Bruneau River, Owyhee River, Snake River, Salmon River, Keotenaai River, and other smaller tributaries. Rail lines include the Union Pacific RR, Northern Pacific RR, and Great Northern RR. The following towns are featured in this map:
    Helena, Missoula, Silver City, Hot Spring, Cleft, Nameko, Mountain Home, Caldwell, Middleton, Idaho City, Moscow, Lewiston, Coeur d’Alene, Plummer, Salmon River, Hailey, Blackfoot, St Anthony, and others.
  • 1903 Idaho Map – Map shows early twentieth century Idaho counties, Native American reservations, township grid, railroads, proposed canal system, lava beds, cities, and towns. Includes index, explanation, number key to railroads.
  • 1927 Map of Idaho – Shows administrative divisions, roads, rivers, etc.

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