Last official estimated population of Moniteau County was 15,621 (year 2014)[1]. This was 0.005% of total US population and 0.3% of total Missouri state population. Area of Moniteau County is 418.9 mi² (=1084.9 km²), in this year population density was 37.29 p/mi². If population growth rate would be same as in period 2010-2014 (+0.02%/yr), Moniteau County population in 2026 would be 15,663 [0].
Historical population of Moniteau County for period 1850-2014 [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

[1850-1860] +5.36 %/yr
[1860-1870] +1.17 %/yr
[1870-1880] +2.35 %/yr
[1880-1890] +0.86 %/yr
[1890-1900] +0.19 %/yr
[1900-1910] -1.02 %/yr
[1910-1920] -0.6 %/yr
[1920-1930] -1.05 %/yr
[1930-1940] -0.33 %/yr
[1940-1950] -0.82 %/yr
[1950-1960] -0.32 %/yr
[1960-1970] +0.23 %/yr
[1970-1980] +1.17 %/yr
[1980-1990] +0.19 %/yr
[1990-2000] +1.89 %/yr
[2000-2005] +0.64 %/yr
[2005-2010] +0.38 %/yr
[2010-2014] +0.02 %/yr
Looking for settlements in Moniteau County? Visit this page: Settlements in Moniteau County, MO
Population of Moniteau County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 548 | 482 | 1,030 |
| 5 to 9 | 554 | 545 | 1,099 |
| 10 to 14 | 579 | 575 | 1,154 |
| 15 to 19 | 517 | 487 | 1,004 |
| 20 to 24 | 531 | 426 | 957 |
| 25 to 29 | 592 | 435 | 1,027 |
| 30 to 34 | 639 | 430 | 1,069 |
| 35 to 39 | 625 | 444 | 1,069 |
| 40 to 44 | 613 | 452 | 1,065 |
| 45 to 49 | 620 | 456 | 1,076 |
| 50 to 54 | 610 | 543 | 1,153 |
| 55 to 59 | 494 | 448 | 942 |
| 60 to 64 | 419 | 442 | 861 |
| 65 to 69 | 384 | 391 | 775 |
| 70 to 74 | 262 | 265 | 527 |
| 75 to 79 | 213 | 220 | 433 |
| 80 to 84 | 115 | 164 | 279 |
| 85+ | 104 | 232 | 336 |
Moniteau 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 | 8021 | 7102 | 15,123 |
| WAC | 7741 | 7323 | 15,064 |
| WA | 7637 | 7228 | 14,865 |
| NHWAC | 7354 | 7007 | 14,361 |
| NHWA | 7258 | 6917 | 14,175 |
| H | 398 | 335 | 733 |
| BAC | 642 | 65 | 707 |
| HWAC | 387 | 316 | 703 |
| NHBAC | 638 | 56 | 694 |
| HWA | 379 | 311 | 690 |
| BA | 605 | 38 | 643 |
| NHBA | 604 | 32 | 636 |
| TOM | 112 | 100 | 212 |
| NHTOM | 104 | 94 | 198 |
| IAC | 97 | 99 | 196 |
| NHIAC | 91 | 88 | 179 |
| AAC | 46 | 39 | 85 |
| NHAAC | 37 | 34 | 71 |
| IA | 35 | 35 | 70 |
| NHIA | 33 | 27 | 60 |
| AA | 25 | 31 | 56 |
| NHAA | 18 | 27 | 45 |
| NAC | 12 | 15 | 27 |
| NHNAC | 11 | 15 | 26 |
| HIAC | 6 | 11 | 17 |
| HAAC | 9 | 5 | 14 |
| HTOM | 8 | 6 | 14 |
| HBAC | 4 | 9 | 13 |
| HAA | 7 | 4 | 11 |
| NA | 5 | 5 | 10 |
| HIA | 2 | 8 | 10 |
| NHNA | 4 | 5 | 9 |
| HBA | 1 | 6 | 7 |
| HNAC | 1 | 0 | 1 |
| HNA | 1 | 0 | 1 |
• Boone County population
28.7 mi,
30°
• Cole County
18.7 mi,
118°
• Callaway County
38.2 mi,
68°
• Camden County
43 mi,
193°
• Pettis County
38.4 mi,
279°
• Miller County
29.9 mi,
163°
• Morgan County
21.5 mi,
227°
• Cooper County
19.2 mi,
319°
• Osage County
40.8 mi,
106°
• Howard County
35.8 mi,
350°
[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
*Cole, Morgan Missouri Notes
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