Last official estimated population of Douglas County was 286,920 (year 2014)[1]. This was 0.09% of total US population and 5.3% of total Colorado state population. Area of Douglas County is 842.8 mi² (=2183 km²), in this year population density was 340.42 p/mi². If population growth rate would be same as in period 2010-2014 (+0.13%/yr), Douglas County population in 2024 would be 290,590 [0].
Historical population of Douglas County for period 1870-2014 [1] , [2] , [3]:
Estimated population for 2014[1]. Population density is in p./sq.mi [4]. Changes are for period 2010-2015. Value is %/year. Boundary lines are approx. 2012 [5]. Click on flag to hide it.
Population • Density • Changes • Legends • Position
[1870-1880] +6 %/yr
[1880-1890] +1.92 %/yr
[1890-1900] +0.37 %/yr
[1900-1910] +0.23 %/yr
[1910-1920] +0.97 %/yr
[1920-1930] -0.05 %/yr
[1930-1940] -0.01 %/yr
[1940-1950] +0.03 %/yr
[1950-1960] +3.22 %/yr
[1960-1970] +5.73 %/yr
[1970-1980] +11.58 %/yr
[1980-1990] +9.15 %/yr
[1990-2000] +11.27 %/yr
[2000-2005] +6.71 %/yr
[2005-2010] +3.26 %/yr
[2010-2014] +0.13 %/yr
Looking for settlements in Douglas County? Visit this page: Settlements in Douglas County, CO
Population of Douglas County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 10230 | 9486 | 19,716 |
| 5 to 9 | 13047 | 12457 | 25,504 |
| 10 to 14 | 14765 | 13813 | 28,578 |
| 15 to 19 | 11685 | 11100 | 22,785 |
| 20 to 24 | 7423 | 7281 | 14,704 |
| 25 to 29 | 6983 | 7072 | 14,055 |
| 30 to 34 | 9250 | 9947 | 19,197 |
| 35 to 39 | 11089 | 11689 | 22,778 |
| 40 to 44 | 13771 | 14094 | 27,865 |
| 45 to 49 | 13068 | 13422 | 26,490 |
| 50 to 54 | 12430 | 12652 | 25,082 |
| 55 to 59 | 10215 | 10320 | 20,535 |
| 60 to 64 | 7827 | 8264 | 16,091 |
| 65 to 69 | 6112 | 6689 | 12,801 |
| 70 to 74 | 3947 | 3993 | 7,940 |
| 75 to 79 | 2101 | 2441 | 4,542 |
| 80 to 84 | 1295 | 1643 | 2,938 |
| 85+ | 1043 | 1994 | 3,037 |
Douglas County resident population estimates by Sex, Race, and Hispanic Origin[1b]. For full list of abbrevations see: population.us/about page.
| Race | Male | Female | Total |
| WAC | 146580 | 148038 | 294,618 |
| NH | 143484 | 145065 | 288,549 |
| WA | 142935 | 144485 | 287,420 |
| NHWAC | 134495 | 135554 | 270,049 |
| NHWA | 131357 | 132501 | 263,858 |
| H | 12797 | 13292 | 26,089 |
| HWAC | 12085 | 12484 | 24,569 |
| HWA | 11578 | 11984 | 23,562 |
| AAC | 8253 | 9246 | 17,499 |
| NHAAC | 7938 | 8865 | 16,803 |
| AA | 6203 | 7225 | 13,428 |
| NHAA | 6064 | 7040 | 13,104 |
| TOM | 3826 | 3757 | 7,583 |
| NHTOM | 3284 | 3211 | 6,495 |
| BAC | 3485 | 2947 | 6,432 |
| NHBAC | 3121 | 2586 | 5,707 |
| BA | 2455 | 1950 | 4,405 |
| NHBA | 2227 | 1726 | 3,953 |
| IAC | 1638 | 1719 | 3,357 |
| NHIAC | 1096 | 1140 | 2,236 |
| IA | 702 | 757 | 1,459 |
| HIAC | 542 | 579 | 1,121 |
| HTOM | 542 | 546 | 1,088 |
| NHIA | 426 | 447 | 873 |
| NAC | 395 | 445 | 840 |
| HBAC | 364 | 361 | 725 |
| NHNAC | 335 | 370 | 705 |
| HAAC | 315 | 381 | 696 |
| HIA | 276 | 310 | 586 |
| HBA | 228 | 224 | 452 |
| NA | 160 | 183 | 343 |
| HAA | 139 | 185 | 324 |
| NHNA | 126 | 140 | 266 |
| HNAC | 60 | 75 | 135 |
| HNA | 34 | 43 | 77 |
• El Paso County population
40.5 mi, 
148°
• Denver County
30.2 mi, 
4°
• Arapahoe County
38.6 mi, 
55°
• Jefferson County
24.5 mi, 
315°
• Broomfield County
43.9 mi, 
351°
• Teller County
34.2 mi, 
203°
• Elbert County
43.2 mi, 
91°
• Park County
44.7 mi, 
251°
• Clear Creek County
47 mi, 
302°
• Gilpin County
49 mi, 319°
[0] Calculated by population.us from last known population growth rate, not official data.
[1] County population - 2014, archived from the original, retrieved 02/23/2016
[1b] Annual County Resident Population Estimates by Age, Sex, Race, and Hispanic Origin, (used only data for 2014) archived from the original, retrieved 02/23/2016
[2] County population - 2000-2010, archived from the original, retrieved 02/23/2016
[3] Population of States and Counties of the United States: 1790 to 1992, PDF, 15 Mb, census.gov, retrieved 02/23/2016
[4] County area, latitude longitude data, retrieved 02/23/2016
[5] County boundaries, CSV files on boundaries.us, retrived 03/18/2016
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