Old Historical State, County and City Maps of Colorado

Maps of Colorado

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Our collection of old historical Colorado maps span over 150 years of growth. Most historical maps of Colorado were published in atlases.

Colorado Geological Survey Maps are available from the Rocky Mountain Mapping Center.

The Western History and Genealogy Department at the Denver Public Library has an extensive collection of over 2,000 maps, which includes explorations, surveys, railroad maps, trails, mining expeditions, and land grants.

Map collections are also located at the University of Colorado map libraryColorado State Archives, and the School of Mines’ Arthur Lakes Library.

The Colorado Territory was formed on February 28, 1861 The State of Colorado was created on February 28, 1861 state on August 1, 1876. States bordering Colorado are are Arizona, Kansas, Nebraska, New Mexico, OklahomaUtah and Wyoming.

Several types of maps are useful for genealogists. Any Historical Colorado Map can indicate who owned specific property in the state and which towns held the county seat at the time.  This information is a valuable starting point for your research pointing you to the right location of records.

Map of Colorado County Formations 1877-1988

This Interactive Map of Colorado Counties show the historical boundaries, names, organization, and attachments of every county, extinct county and unsuccessful county proposal from the creation of Georgia in 1877-1988.

Colorado contains 64 counties.

In 1861 the first Colorado counties were formed. They were Adams, Arapahoe, Boulder, Clear Creek, Conejos, Costilla, Douglas, El Paso, Fremont, Gilpin, Huerfano, Jefferson, Larimer, Park, Pueblo, San Miguel, Summit and Weld Counties. . The last county to be formed was Broomfield County in 2001.

Colorado County Map Formation by Year

Colorado 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. Al – Alamosa Co.
  10. Ara – Arapahoe Co.
  11. Arc – Archuleta Co.
  12. Ba – Baca Co.
  13. Be – Bent Co.
  14. Bo – Boulder Co.
  15. CC – Clear Creek Co.
  16. Cha – Chaffee Co.
  17. Che – Cheyenne Co.
  18. Con – Conejos Co.
  19. Cos – Costilla Co.
  1. Cr – Crowley Co.
  2. Cu – Custer Co.
  3. Del – Delta Co.
  4. Den – Denver Co.
  5. Dol – Dolores Co.
  6. Dou – Douglas Co.
  7. Ea – Eagle Co.
  8. Elb – Elbert Co.
  9. EP – El Paso Co.
  10. Fr – Fremont Co.
  11. Ga – Garfield Co.
  12. Gi – Gilpin Co.
  13. Gra – Grand Co.
  14. Gun – Gunnison Co.
  15. Hi – Hinsdale Co.
  16. Hu – Huerfano Co.
  17. Ja – Jackson Co.
  18. Je – Jefferson Co.
  1. KC – Kit Carson Co.
  2. Kio – Kiowa Co.
  3. LA – Las Animas Co.
  4. Lak – Lake Co.
  5. Lar – Larimer Co.
  6. Li – Lincoln Co.
  7. Lo – Logan Co.
  8. LP – La Plata Co.
  9. Me – Mesa Co.
  10. Mgn – Morgan Co.
  11. Mi – Mineral Co.
  12. Mof – Moffatt Co.
  13. Mtr – Montrose Co.
  14. Mtz – Montezuma Co.
  15. Ot – Otero Co.
  16. Ou – Ouray Co.
  17. Pa – Park Co.
  18. Ph – Phillips Co.
  19. Pi – Pitkin Co.
  1. Pr – Prowers Co.
  2. Pu – Pueblo Co.
  3. RB – Rio Blanco Co.
  4. RG – Rio Grande Co.
  5. Ro – Routt Co.
  6. Sag – Saguache Co.
  7. Se – Sedgwick Co.
  8. SJ – San Juan Co.
  9. SM – San Miguel Co.
  10. Su – Summit Co.
  11. Te – Teller Co.
  12. Wa – Washington Co.
  13. We – Weld Co.
  14. Yu – Yuma Co.

Old Historical Atlas Maps of Colorado

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

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

External Colorado Map Links

Colorado County Map of Road and Highway's

The Colorado D.O.T. Highway Department has prepared a series of 2017 county road maps. These maps contain more detailed information about man-made features than the geological survey maps. In addition to roads and boundaries, these maps include rural communities, churches, and cemeteries.

These maps are downloadable and are in PDF format. The main use of these are the locations of all known cemeteries in a county and of course the various roads and church locations. These Maps are Free to Download

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