Last official estimated population of Audrain County was 25,461 (year 2014)[1]. This was 0.008% of total US population and 0.4% of total Missouri state population. Area of Audrain County is 696.8 mi² (=1804.8 km²), in this year population density was 36.54 p/mi². If population growth rate would be same as in period 2010-2014 (-0.07%/yr), Audrain County population in 2024 would be 25,292 [0].
Historical population of Audrain County for period 1840-2014 [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
[1840-1850] +6.05 %/yr
[1850-1860] +8.7 %/yr
[1860-1870] +4.3 %/yr
[1870-1880] +4.83 %/yr
[1880-1890] +1.13 %/yr
[1890-1900] -0.42 %/yr
[1900-1910] +0.25 %/yr
[1910-1920] -0.52 %/yr
[1920-1930] +0.7 %/yr
[1930-1940] +0.27 %/yr
[1940-1950] +0.5 %/yr
[1950-1960] +0.91 %/yr
[1960-1970] -0.28 %/yr
[1970-1980] +0.42 %/yr
[1980-1990] -1.14 %/yr
[1990-2000] +0.92 %/yr
[2000-2005] -0.1 %/yr
[2005-2010] -0.15 %/yr
[2010-2014] -0.07 %/yr
Looking for settlements in Audrain County? Visit this page: Settlements in Audrain County, MO
Population of Audrain County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 820 | 762 | 1,582 |
| 5 to 9 | 836 | 793 | 1,629 |
| 10 to 14 | 921 | 842 | 1,763 |
| 15 to 19 | 964 | 744 | 1,708 |
| 20 to 24 | 654 | 943 | 1,597 |
| 25 to 29 | 620 | 1041 | 1,661 |
| 30 to 34 | 673 | 1032 | 1,705 |
| 35 to 39 | 641 | 967 | 1,608 |
| 40 to 44 | 691 | 900 | 1,591 |
| 45 to 49 | 680 | 900 | 1,580 |
| 50 to 54 | 817 | 946 | 1,763 |
| 55 to 59 | 860 | 936 | 1,796 |
| 60 to 64 | 750 | 837 | 1,587 |
| 65 to 69 | 654 | 645 | 1,299 |
| 70 to 74 | 470 | 575 | 1,045 |
| 75 to 79 | 316 | 431 | 747 |
| 80 to 84 | 235 | 368 | 603 |
| 85+ | 167 | 456 | 623 |
Audrain 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 |
| NH | 11398 | 13814 | 25,212 |
| WAC | 10959 | 12857 | 23,816 |
| WA | 10728 | 12610 | 23,338 |
| NHWAC | 10614 | 12579 | 23,193 |
| NHWA | 10399 | 12345 | 22,744 |
| BAC | 812 | 1296 | 2,108 |
| NHBAC | 792 | 1281 | 2,073 |
| BA | 658 | 1126 | 1,784 |
| NHBA | 647 | 1116 | 1,763 |
| H | 371 | 304 | 675 |
| HWAC | 345 | 278 | 623 |
| HWA | 329 | 265 | 594 |
| TOM | 242 | 262 | 504 |
| NHTOM | 225 | 249 | 474 |
| IAC | 107 | 127 | 234 |
| AAC | 120 | 84 | 204 |
| NHAAC | 116 | 83 | 199 |
| NHIAC | 89 | 106 | 195 |
| AA | 83 | 45 | 128 |
| NHAA | 83 | 45 | 128 |
| IA | 52 | 67 | 119 |
| NHIA | 40 | 53 | 93 |
| HIAC | 18 | 21 | 39 |
| NAC | 18 | 21 | 39 |
| HBAC | 20 | 15 | 35 |
| NHNAC | 16 | 19 | 35 |
| HTOM | 17 | 13 | 30 |
| HIA | 12 | 14 | 26 |
| HBA | 11 | 10 | 21 |
| NA | 6 | 8 | 14 |
| NHNA | 4 | 6 | 10 |
| HAAC | 4 | 1 | 5 |
| HNAC | 2 | 2 | 4 |
| HNA | 2 | 2 | 4 |
| HAA | 0 | 0 | 0 |
• Boone County population
29.4 mi, 
238°
• Callaway County
26.5 mi, 
189°
• Marion County
42.4 mi, 
15°
• Randolph County
38 mi, 
294°
• Pike County
37 mi, 
76°
• Montgomery County
28 mi, 
133°
• Ralls County
28.9 mi, 
35°
• Howard County
45.9 mi, 
263°
• Monroe County
21.5 mi, 
336°
• Shelby County
42.4 mi, 342°
[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
*Ralls, Callaway Missouri Notes
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