Last official estimated population of Douglas County was 19,957 (year 2014)[1]. This was 0.006% of total US population and 0.2% of total Illinois state population. Area of Douglas County is 417.2 mi² (=1080.6 km²), in this year population density was 47.83 p/mi². If population growth rate would be same as in period 2010-2014 (-0.03%/yr), Douglas County population in 2026 would be 19,888 [0].
Historical population of Douglas County for period 1860-2014 [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
[1860-1870] +6.56 %/yr
[1870-1880] +1.63 %/yr
[1880-1890] +1.09 %/yr
[1890-1900] +0.78 %/yr
[1900-1910] +0.26 %/yr
[1910-1920] +0.01 %/yr
[1920-1930] -0.9 %/yr
[1930-1940] -0.18 %/yr
[1940-1950] -0.51 %/yr
[1950-1960] +1.42 %/yr
[1960-1970] -0.13 %/yr
[1970-1980] +0.4 %/yr
[1980-1990] -0.16 %/yr
[1990-2000] +0.23 %/yr
[2000-2005] +0.19 %/yr
[2005-2010] -0.12 %/yr
[2010-2014] -0.03 %/yr
Looking for settlements in Douglas County? Visit this page: Settlements in Douglas County, IL
Population of Douglas County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 705 | 624 | 1,329 |
| 5 to 9 | 706 | 701 | 1,407 |
| 10 to 14 | 786 | 715 | 1,501 |
| 15 to 19 | 651 | 614 | 1,265 |
| 20 to 24 | 564 | 573 | 1,137 |
| 25 to 29 | 636 | 607 | 1,243 |
| 30 to 34 | 588 | 619 | 1,207 |
| 35 to 39 | 626 | 607 | 1,233 |
| 40 to 44 | 539 | 559 | 1,098 |
| 45 to 49 | 623 | 565 | 1,188 |
| 50 to 54 | 699 | 681 | 1,380 |
| 55 to 59 | 738 | 728 | 1,466 |
| 60 to 64 | 597 | 596 | 1,193 |
| 65 to 69 | 485 | 483 | 968 |
| 70 to 74 | 323 | 365 | 688 |
| 75 to 79 | 265 | 372 | 637 |
| 80 to 84 | 188 | 280 | 468 |
| 85+ | 155 | 326 | 481 |
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 | 9681 | 9873 | 19,554 |
| WA | 9579 | 9758 | 19,337 |
| NH | 9092 | 9339 | 18,431 |
| NHWAC | 8958 | 9222 | 18,180 |
| NHWA | 8865 | 9117 | 17,982 |
| H | 782 | 676 | 1,458 |
| HWAC | 723 | 651 | 1,374 |
| HWA | 714 | 641 | 1,355 |
| BAC | 113 | 123 | 236 |
| TOM | 106 | 122 | 228 |
| NHTOM | 95 | 112 | 207 |
| NHBAC | 85 | 106 | 191 |
| AAC | 113 | 75 | 188 |
| NHAAC | 85 | 71 | 156 |
| AA | 90 | 52 | 142 |
| IAC | 67 | 64 | 131 |
| BA | 63 | 59 | 122 |
| NHAA | 63 | 49 | 112 |
| NHIAC | 53 | 51 | 104 |
| NHBA | 41 | 46 | 87 |
| IA | 28 | 24 | 52 |
| HBAC | 28 | 17 | 45 |
| HBA | 22 | 13 | 35 |
| NHIA | 20 | 15 | 35 |
| HAAC | 28 | 4 | 32 |
| HAA | 27 | 3 | 30 |
| HIAC | 14 | 13 | 27 |
| HTOM | 11 | 10 | 21 |
| HIA | 8 | 9 | 17 |
| NAC | 9 | 5 | 14 |
| NHNAC | 9 | 3 | 12 |
| NHNA | 8 | 0 | 8 |
| NA | 8 | 0 | 8 |
| HNAC | 0 | 2 | 2 |
| HNA | 0 | 0 | 0 |
• Champaign County population
25.8 mi, 
3°
• Macon County
39.7 mi, 
279°
• Vermilion County
39.2 mi, 
42°
• Coles County
17.4 mi, 
179°
• Shelby County
40.4 mi, 
229°
• Edgar County
26 mi, 
103°
• Piatt County
25.8 mi, 
310°
• Clark County
37.8 mi, 
142°
• Moultrie County
23.2 mi, 
247°
• Cumberland County
34.1 mi, 181°
[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
*Coles Illinois Notes
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