Last official estimated population of Clinton County was 20,749 (year 2014)[1]. This was 0.007% of total US population and 0.3% of total Missouri state population. Area of Clinton County is 423.5 mi² (=1096.8 km²), in this year population density was 49.00 p/mi². If population growth rate would be same as in period 2010-2014 (+0.01%/yr), Clinton County population in 2026 would be 20,767 [0].
Historical population of Clinton 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] +3.35 %/yr
[1850-1860] +7.56 %/yr
[1860-1870] +6.01 %/yr
[1870-1880] +1.34 %/yr
[1880-1890] +0.64 %/yr
[1890-1900] +0.13 %/yr
[1900-1910] -1.26 %/yr
[1910-1920] -0.56 %/yr
[1920-1930] -0.68 %/yr
[1930-1940] -0.18 %/yr
[1940-1950] -1.22 %/yr
[1950-1960] -0.12 %/yr
[1960-1970] +0.73 %/yr
[1970-1980] +2.48 %/yr
[1980-1990] +0.42 %/yr
[1990-2000] +1.36 %/yr
[2000-2005] +1.42 %/yr
[2005-2010] +0.34 %/yr
[2010-2014] +0.01 %/yr
Looking for settlements in Clinton County? Visit this page: Settlements in Clinton County, MO
Population of Clinton County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 666 | 522 | 1,188 |
| 5 to 9 | 690 | 627 | 1,317 |
| 10 to 14 | 733 | 692 | 1,425 |
| 15 to 19 | 697 | 628 | 1,325 |
| 20 to 24 | 603 | 528 | 1,131 |
| 25 to 29 | 533 | 501 | 1,034 |
| 30 to 34 | 525 | 613 | 1,138 |
| 35 to 39 | 588 | 565 | 1,153 |
| 40 to 44 | 630 | 661 | 1,291 |
| 45 to 49 | 681 | 674 | 1,355 |
| 50 to 54 | 788 | 800 | 1,588 |
| 55 to 59 | 780 | 767 | 1,547 |
| 60 to 64 | 620 | 683 | 1,303 |
| 65 to 69 | 568 | 548 | 1,116 |
| 70 to 74 | 395 | 434 | 829 |
| 75 to 79 | 312 | 316 | 628 |
| 80 to 84 | 213 | 229 | 442 |
| 85+ | 211 | 278 | 489 |
Clinton 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 | 10032 | 9847 | 19,879 |
| WAC | 9945 | 9757 | 19,702 |
| WA | 9765 | 9599 | 19,364 |
| NHWAC | 9756 | 9566 | 19,322 |
| NHWA | 9585 | 9414 | 18,999 |
| BAC | 253 | 231 | 484 |
| NHBAC | 247 | 217 | 464 |
| H | 201 | 219 | 420 |
| HWAC | 189 | 191 | 380 |
| HWA | 180 | 185 | 365 |
| TOM | 187 | 165 | 352 |
| NHTOM | 178 | 159 | 337 |
| BA | 174 | 155 | 329 |
| NHBA | 172 | 145 | 317 |
| IAC | 137 | 158 | 295 |
| NHIAC | 126 | 140 | 266 |
| AAC | 76 | 84 | 160 |
| NHAAC | 73 | 81 | 154 |
| IA | 64 | 88 | 152 |
| NHIA | 56 | 72 | 128 |
| AA | 41 | 59 | 100 |
| NHAA | 39 | 57 | 96 |
| HIAC | 11 | 18 | 29 |
| HIA | 8 | 16 | 24 |
| NAC | 15 | 7 | 22 |
| NHNAC | 14 | 7 | 21 |
| HBAC | 6 | 14 | 20 |
| HTOM | 9 | 6 | 15 |
| HBA | 2 | 10 | 12 |
| HAAC | 3 | 3 | 6 |
| HAA | 2 | 2 | 4 |
| NA | 2 | 0 | 2 |
| NHNA | 2 | 0 | 2 |
| HNAC | 1 | 0 | 1 |
| HNA | 0 | 0 | 0 |
• Clay County population
20.3 mi, 
183°
• Wyandotte County
39.3 mi, 
209°
• Platte County
25.2 mi, 
230°
• Buchanan County
22.2 mi, 
279°
• Ray County
29.8 mi, 
134°
• Andrew County
34 mi, 
320°
• DeKalb County
19.8 mi, 
358°
• Caldwell County
22.4 mi, 
81°
• Daviess County
33.3 mi, 
42°
• Gentry County
41.4 mi, 359°
[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
*Clay Missouri Notes
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