Colorado Area Codes

Colorado is a state located in the Rocky Mountain States region in the southeastern United States. It has the highest mountains in this chain. The Spaniards, the region’s first explorers, gave the state its name because of the reddish color of the lands near the Colorado River.

The blue catchment is the symbol of the state of Colorado

Much of the state’s region was annexed by the United States in the Louisiana Purchase in 1803. The other part, owned by Mexico, was conquered after the end of the Mexican-American War in 1848. The population increase as a result of the gold discoveries in the region, and the territory became the 38th state of the United States, in August 1876.

  • Find major meanings of abbreviation CO including the most common definition – Colorado. Also see the list of other meanings in addition to Colorado.
  • Provides ranking of top ten cities and towns in Colorado by population. Also includes alphabetical list of and profile of each city of Colorado.

The state is limited to Kansas to the east, Wyoming to the north, Utah to the west, and Oklahoma and New Mexico to the south. Several rivers originate in Colorado, as a result of melting snow from its mountains, which together occupy about two-fifths of its entire territory. In winter, the average temperature in the state is -2ºC; in summer, 23ºC.

The great snowfall in its mountains in winter makes Colorado a major tourist hub. Numerous ski resorts are located in the region, some with international recognition. In addition to tourism, the financial, real estate and telecommunications services sector accounts for a significant part of the State’s GDP. The main products manufactured in the state are transport equipment, food and chemical products.

Its capital and largest city is Denver, which has about 2.3 million residents in its metropolitan area.


Population: 104.951 thousand people (2008)
Area: 117.5 sq. km
Time zone: UTC-7, summer UTC-6
Altitude: 1,430 m

Pueblo is the most populous city in Pueblo County, Colorado. The Pueblo is located at the confluence of the Arkansas River, which is a major tributary of the Mississippi River and Fountain Creek. Pueblo is one of the largest steel cities in the United States, earning it the name “Steel City”. Pueblo is one of the most expensive cities in Colorado, due to the highest real estate prices.

The City of Pueblo was formed from the amalgamation of four cities: Pueblo, South Pueblo, Pueblo Central, and Bessemer. This city has always been a major economic and social center of Colorado, until in 1921 there was a large-scale flood known in history. This catastrophe caused great damage to the city, as a result of numerous destructions, its restoration lasted more than one year. However, despite the hardships and troubles today, Pueblo is the center of many events in Colorado. For example, every year in this city is held the famous fair in America, which presents a huge range of US products.

The attention of tourists in this city is attracted by the local history museum (Historical Museum of El Pueblo). The museum presents the history of the Pueblo, along with the cultural and ethnic groups of the region. Pueblo Lake is home to the city’s famous “State Park” located in Pueblo County, Colorado. In this park, you can not only enjoy exotic nature, but also relax on comfortable beaches and go fishing.

It would be interesting to visit nature reserves in the city, where a huge number of unique plant species grow. The park, which is located in the rock of the Canyon on the banks of the Arkansas River, is also known for its picturesque landscapes. The Zoo, popular in the city, is famous for the diversity of its animal world. You can visit it at any time of the year. Draws the attention of tourists Union Avenue (historic shopping district), which often hosts numerous social events.

Map of Area Codes in Colorado

Area Code Map of Colorado

Colorado consists of the following area codes. Click on the area code to show the cities in that area code.

Colorado Area Codes by County

The area code of 303 is used in the following 9 counties:

  1. Adams, CO
  2. Arapahoe, CO
  3. Boulder, CO
  4. Clear Creek, CO
  5. Denver, CO
  6. Douglas, CO
  7. Jefferson, CO
  8. Morgan, CO
  9. Weld, CO

The area code of 719 is used in the following 28 counties:

  1. Alamosa, CO
  2. Arapahoe, CO
  3. Baca, CO
  4. Bent, CO
  5. Chaffee, CO
  6. Cheyenne, CO
  7. Conejos, CO
  8. Costilla, CO
  9. Crowley, CO
  10. Custer, CO
  11. Denver, CO
  12. El Paso, CO
  13. Elbert, CO
  14. Fremont, CO
  15. Huerfano, CO
  16. Kiowa, CO
  17. Kit Carson, CO
  18. Lake, CO
  19. Las Animas, CO
  20. Lincoln, CO
  21. Mineral, CO
  22. Otero, CO
  23. Park, CO
  24. Prowers, CO
  25. Pueblo, CO
  26. Rio Grande, CO
  27. Saguache, CO
  28. Teller, CO

The area code of 720 is used in the following 9 counties:

  1. Adams, CO
  2. Arapahoe, CO
  3. Boulder, CO
  4. Clear Creek, CO
  5. Denver, CO
  6. Douglas, CO
  7. Gilpin, CO
  8. Jefferson, CO
  9. Weld, CO

The area code of 970 is used in the following 32 counties:

  1. Archuleta, CO
  2. Boulder, CO
  3. Delta, CO
  4. Denver, CO
  5. Dolores, CO
  6. Eagle, CO
  7. Garfield, CO
  8. Grand, CO
  9. Gunnison, CO
  10. Hinsdale, CO
  11. Jackson, CO
  12. Kit Carson, CO
  13. La Plata, CO
  14. Larimer, CO
  15. Lincoln, CO
  16. Logan, CO
  17. Mesa, CO
  18. Moffat, CO
  19. Montezuma, CO
  20. Montrose, CO
  21. Morgan, CO
  22. Ouray, CO
  23. Phillips, CO
  24. Pitkin, CO
  25. Rio Blanco, CO
  26. Routt, CO
  27. San Miguel, CO
  28. Sedgwick, CO
  29. Summit, CO
  30. Washington, CO
  31. Weld, CO
  32. Yuma, CO