Colorado (CO)


Colorado, which joined the union as the 38th state in 1876, is America’s eighth largest state in terms of land mass. Located in the Rocky Mountain region of the western United States, the state’s abundant and varied natural resources attracted the ancient Pueblo peoples and later the Plains Indians.

First explored by Europeans in the late 1500s (the Spaniards called the region “Colorado” because of the red-colored soil), the area was ceded to the United States in 1848 with the Treaty of Guadalupe Hidalgo that ended the Mexican American War (1846-48).

In 1858, the discovery of gold in Colorado attracted new settlers. During the Plains Indian Wars (1860-80s), Colorado’s wild frontier was the scene of intense fighting between Native Americans and white settlers.

In the 21st century, Colorado continues to rely on natural resources as well as agriculture and tourism to sustain its economy.


Colorado is a state located in the western United States. It is home to majestic mountain peaks, picturesque valleys, and a wide range of climates and landscapes. Colorado covers an area of 104,094 square miles and is the eighth largest state in the U.S. by area. The state is bordered to the north by Wyoming, to the east by Nebraska and Kansas, to the south by Oklahoma and New Mexico, and to the west by Utah.

The Rocky Mountains dominate Colorado’s landscape; they run from north to south through most of the state with many peaks towering over 14,000 feet in elevation. These mountains are divided into several distinct ranges including the Front Range, Sawatch Range, San Juan Mountains, Sangre de Cristo Mountains and Mosquito Range among others. Along with these mountains come several other distinct geographic features including canyons, mesas and plateaus.

The eastern side of Colorado consists mostly of rolling plains that stretch from Nebraska all the way down into New Mexico. This region is known as Colorado’s High Plains or Eastern Plains region and is home to some of Colorado’s major cities such as Denver, Boulder, Pueblo and Colorado Springs. The terrain here generally consists of flat grasslands with occasional hills or buttes scattered throughout.

The western side of Colorado contains more mountainous terrain than its eastern counterpart with several mountain ranges including the Uncompahgre Plateau and San Juan Mountains running through it as well as numerous canyons such as Black Canyon of Gunnison National Park located near Montrose. Topping out at 14,433 feet above sea level Mount Elbert is located here making it the highest peak in all of Colorado as well as one of its most popular tourist attractions for hikers looking for a challenge or for those simply wanting to take in its spectacular views from above sea level.

In addition to all these different landforms, there are also several bodies of water throughout Colorado ranging from large reservoirs like Lake Granby located near Rocky Mountain National Park down to small creeks like Clear Creek which flows out from Idaho Springs into Golden near Denver’s downtown area.

No matter where one may go throughout this diverse state they are certain to find something interesting waiting around every corner making it a great destination for outdoor enthusiasts looking for adventure or those simply wanting some peace away from everyday life no matter what time of year it may be.

Cities in Colorado

Below are the top 15 cities by population in Colorado. For all cities and towns in the state, please see Colorado cities list.

Denver is one of the top cities in Colorado and is the state’s capital. The city is known for its vibrant culture, diverse neighborhoods, and stunning mountain views. It has a bustling downtown area with plenty of restaurants, shops, and entertainment venues. There are also many parks and open spaces to explore, making it an ideal destination for outdoor enthusiasts. Denver also offers a wide range of attractions including the Denver Zoo, 16th Street Mall, and Red Rocks Amphitheater. Additionally, the city has a thriving art scene with numerous art galleries and museums to visit.

Another popular destination in Colorado is Boulder. Located at the base of the Rocky Mountains, this city provides easy access to many outdoor activities including hiking, biking, camping, fishing, and skiing. It also has a vibrant downtown area with plenty of restaurants and stores to explore as well as cultural attractions such as the University of Colorado Museum of Natural History and Chautauqua Park. Boulder also hosts many festivals throughout the year such as Bolder Boulder 10K race in May and The Boulder Creek Festival in June.

Rank City Population
1 Denver 706,799
2 Colorado Springs 475,282
3 Aurora 383,496
4 Fort Collins 166,788
5 Lakewood 155,608
6 Thornton 140,538
7 Arvada 122,903
8 Westminster 115,535
9 Pueblo 111,424
10 Centennial 107,972
11 Greeley 107,014
12 Boulder 104,930
13 Highlands Ranch 103,238
14 Longmont 98,789
15 Loveland 75,938

Counties in Colorado

The State of Colorado consists of 64 counties. They are:

  1. Adams County, Colorado
  2. Alamosa County, Colorado
  3. Arapahoe County, Colorado
  4. Archuleta County, Colorado
  5. Baca County, Colorado
  6. Bent County, Colorado
  7. Boulder County, Colorado
  8. The City and County of Broomfield, Colorado
  9. Chaffee County, Colorado
  10. Cheyenne County, Colorado
  11. Clear Creek County, Colorado
  12. Conejos County, Colorado
  13. Costilla County, Colorado
  14. Crowley County, Colorado
  15. Custer County, Colorado
  16. Delta County, Colorado
  17. The City and County of Denver, Colorado
  18. Dolores County, Colorado
  19. Douglas County, Colorado
  20. Eagle County, Colorado
  21. Elbert County, Colorado
  22. El Paso County, Colorado
  23. Fremont County, Colorado
  24. Garfield County, Colorado
  25. Gilpin County, Colorado
  26. Grand County, Colorado
  27. Gunnison County, Colorado
  28. Hinsdale County, Colorado
  29. Huerfano County, Colorado
  30. Jackson County, Colorado
  31. Jefferson County, Colorado
  32. Kiowa County, Colorado
  33. Kit Carson County, Colorado
  34. Lake County, Colorado
  35. La Plata County, Colorado
  36. Larimer County, Colorado
  37. Las Animas County, Colorado
  38. Lincoln County, Colorado
  39. Logan County, Colorado
  40. Mesa County, Colorado
  41. Mineral County, Colorado
  42. Moffat County, Colorado
  43. Montezuma County, Colorado
  44. Montrose County, Colorado
  45. Morgan County, Colorado
  46. Otero County, Colorado
  47. Ouray County, Colorado
  48. Park County, Colorado
  49. Phillips County, Colorado
  50. Pitkin County, Colorado
  51. Prowers County, Colorado
  52. Pueblo County, Colorado
  53. Rio Blanco County, Colorado
  54. Rio Grande County, Colorado
  55. Routt County, Colorado
  56. Saguache County, Colorado
  57. San Juan County, Colorado
  58. San Miguel County, Colorado
  59. Sedgwick County, Colorado
  60. Summit County, Colorado
  61. Teller County, Colorado
  62. Washington County, Colorado
  63. Weld County, Colorado
  64. Yuma County, Colorado