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About this map

Residents per square mile of land (water excluded). Under 50 is rural, a few hundred is small-town, 2,500+ is urban, and 10,000+ is big-city dense.

Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024).

U.S.
95/sq mi
Colorado
57/sq mi
Rankings
Full list

Top and bottom zip codes in Colorado

Zip codes with 1,000+ residents

Most densely populated zip codes

See all
  1. 180203Denver20,532/sq mi
  2. 280202Denver16,080/sq mi
  3. 380310Boulder14,114/sq mi
  4. 480218Denver12,097/sq mi
  5. 580247Denver10,216/sq mi
  6. 680206Denver9,840/sq mi
  7. 780211Denver8,458/sq mi
  8. 880010Aurora8,258/sq mi
  9. 980219Denver8,064/sq mi
  10. 1080209Denver7,869/sq mi

Most sparsely populated zip codes

See all
  1. 181630De Beque1/sq mi
  2. 280480Walden1/sq mi
  3. 381036Eads1/sq mi
  4. 481527Whitewater2/sq mi
  5. 581149Saguache2/sq mi
  6. 680821Hugo2/sq mi
  7. 780810Cheyenne Wells2/sq mi
  8. 881423Norwood2/sq mi
  9. 981641Meeker2/sq mi
  10. 1081120Antonito2/sq mi

Population density by county in Colorado

  1. 1Denver County4,696/sq mi
  2. 2Broomfield County2,315/sq mi
  3. 3Arapahoe County827/sq mi
  4. 4Jefferson County758/sq mi
  5. 5Adams County454/sq mi
  6. 6Boulder County453/sq mi
  7. 7Douglas County449/sq mi
  8. 8El Paso County349/sq mi
  9. 9Larimer County142/sq mi
  10. 10Weld County88/sq mi
  11. 11Pueblo County71/sq mi
  12. 12Summit County51/sq mi
  13. 13Mesa County48/sq mi
  14. 14Teller County45/sq mi
  15. 15Gilpin County39/sq mi
  16. 16La Plata County33/sq mi
  17. 17Eagle County33/sq mi
  18. 18Fremont County32/sq mi
  19. 19Delta County28/sq mi
  20. 20Clear Creek County23/sq mi
  21. 21Morgan County23/sq mi
  22. 22Alamosa County23/sq mi
  23. 23Garfield County21/sq mi
  24. 24Chaffee County20/sq mi
  25. 25Lake County20/sq mi
  26. 26Montrose County20/sq mi
  27. 27Pitkin County18/sq mi
  28. 28Elbert County15/sq mi
  29. 29Otero County15/sq mi
  30. 30Montezuma County13/sq mi
  31. 31Rio Grande County12/sq mi
  32. 32Logan County11/sq mi
  33. 33Routt County11/sq mi
  34. 34Archuleta County10/sq mi
  35. 35Ouray County9/sq mi
  36. 36Grand County9/sq mi
  37. 37Park County8/sq mi
  38. 38Prowers County7/sq mi
  39. 39Crowley County7/sq mi
  40. 40Custer County7/sq mi
  41. 41Phillips County7/sq mi
  42. 42San Miguel County6/sq mi
  43. 43Conejos County6/sq mi
  44. 44Gunnison County5/sq mi
  45. 45Huerfano County4/sq mi
  46. 46Sedgwick County4/sq mi
  47. 47Yuma County4/sq mi
  48. 48Bent County4/sq mi
  49. 49Kit Carson County3/sq mi
  50. 50Las Animas County3/sq mi
  51. 51Costilla County3/sq mi
  52. 52Moffat County3/sq mi
  53. 53Dolores County2/sq mi
  54. 54Lincoln County2/sq mi
  55. 55Saguache County2/sq mi
  56. 56Rio Blanco County2/sq mi
  57. 57San Juan County2/sq mi
  58. 58Washington County2/sq mi
  59. 59Baca County1/sq mi
  60. 60Cheyenne County1/sq mi
  61. 61Hinsdale County1/sq mi
  62. 62Jackson County1/sq mi
  63. 63Kiowa County1/sq mi
  64. 64Mineral County1/sq mi

Questions about this map

Which zip code has the highest population density in Colorado?

Among zip codes with at least 1,000 residents, 80203 (Denver, CO) has the highest: 20,532/sq mi.

Which zip code has the lowest population density in Colorado?

81630 (De Beque, CO) has the lowest: 1/sq mi.

What is the population density for the United States?

95/sq mi; in Colorado it is 57/sq mi.

Where does this data come from?

U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024). Residents per square mile of land (water excluded). Under 50 is rural, a few hundred is small-town, 2,500+ is urban, and 10,000+ is big-city dense.

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