Last official estimated population of Platte County was 89,727 (year 2014)[1]. This was 0.028% of total US population and 1.5% of total Missouri state population. Area of Platte County is 426.8 mi² (=1105.4 km²), in this year population density was 210.23 p/mi². If population growth rate would be same as in period 2010-2014 (+0.11%/yr), Platte County population in 2026 would be 90,953 [0].
Historical population of Platte 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] +6.57 %/yr
[1850-1860] +0.86 %/yr
[1860-1870] -0.56 %/yr
[1870-1880] +0.01 %/yr
[1880-1890] -0.66 %/yr
[1890-1900] -0.03 %/yr
[1900-1910] -1.15 %/yr
[1910-1920] -0.3 %/yr
[1920-1930] -0.13 %/yr
[1930-1940] +0.03 %/yr
[1940-1950] +0.77 %/yr
[1950-1960] +4.54 %/yr
[1960-1970] +3.23 %/yr
[1970-1980] +3.75 %/yr
[1980-1990] +2.25 %/yr
[1990-2000] +2.47 %/yr
[2000-2005] +2.28 %/yr
[2005-2010] +1.57 %/yr
[2010-2014] +0.11 %/yr
Looking for settlements in Platte County? Visit this page: Settlements in Platte County, MO
Population of Platte County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 2937 | 2874 | 5,811 |
| 5 to 9 | 3138 | 3102 | 6,240 |
| 10 to 14 | 3385 | 3247 | 6,632 |
| 15 to 19 | 3232 | 3018 | 6,250 |
| 20 to 24 | 2969 | 2760 | 5,729 |
| 25 to 29 | 2985 | 2984 | 5,969 |
| 30 to 34 | 3312 | 3278 | 6,590 |
| 35 to 39 | 3166 | 3162 | 6,328 |
| 40 to 44 | 3298 | 3389 | 6,687 |
| 45 to 49 | 3195 | 3262 | 6,457 |
| 50 to 54 | 3664 | 3736 | 7,400 |
| 55 to 59 | 3265 | 3473 | 6,738 |
| 60 to 64 | 2744 | 2928 | 5,672 |
| 65 to 69 | 2157 | 2280 | 4,437 |
| 70 to 74 | 1504 | 1591 | 3,095 |
| 75 to 79 | 889 | 1015 | 1,904 |
| 80 to 84 | 533 | 775 | 1,308 |
| 85+ | 474 | 1067 | 1,541 |
Platte 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 | 44098 | 45317 | 89,415 |
| WAC | 41881 | 43152 | 85,033 |
| WA | 40797 | 42035 | 82,832 |
| NHWAC | 39394 | 40751 | 80,145 |
| NHWA | 38450 | 39745 | 78,195 |
| BAC | 3698 | 3384 | 7,082 |
| NHBAC | 3498 | 3233 | 6,731 |
| BA | 3219 | 2889 | 6,108 |
| NHBA | 3082 | 2790 | 5,872 |
| H | 2749 | 2624 | 5,373 |
| HWAC | 2487 | 2401 | 4,888 |
| HWA | 2347 | 2290 | 4,637 |
| AAC | 1560 | 1714 | 3,274 |
| NHAAC | 1486 | 1647 | 3,133 |
| AA | 1192 | 1328 | 2,520 |
| NHAA | 1163 | 1289 | 2,452 |
| TOM | 1154 | 1199 | 2,353 |
| NHTOM | 995 | 1072 | 2,067 |
| IAC | 673 | 645 | 1,318 |
| NHIAC | 527 | 517 | 1,044 |
| NAC | 274 | 326 | 600 |
| NHNAC | 254 | 308 | 562 |
| IA | 283 | 246 | 529 |
| NA | 202 | 244 | 446 |
| NHNA | 196 | 240 | 436 |
| NHIA | 212 | 181 | 393 |
| HBAC | 200 | 151 | 351 |
| HTOM | 159 | 127 | 286 |
| HIAC | 146 | 128 | 274 |
| HBA | 137 | 99 | 236 |
| HAAC | 74 | 67 | 141 |
| HIA | 71 | 65 | 136 |
| HAA | 29 | 39 | 68 |
| HNAC | 20 | 18 | 38 |
| HNA | 6 | 4 | 10 |
• Jackson County population
34.2 mi, 
139°
• Johnson County
34.3 mi, 
185°
• Clay County
18.7 mi, 
103°
• Wyandotte County
18.2 mi, 
180°
• Buchanan County
19.6 mi, 
352°
• Leavenworth County
19.8 mi, 
228°
• Clinton County
25.2 mi, 
50°
• Jefferson County
34.2 mi, 
253°
• Atchison County
31.3 mi, 
289°
• Doniphan County
35 mi, 
324°
[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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