Last official estimated population of Harrison County was 8,952 (year 2014)[1]. This was 0.003% of total US population and 0.1% of total Missouri state population. Area of Harrison County is 726.4 mi² (=1881.4 km²), in this year population density was 12.32 p/mi². If population growth rate would be same as in period 2010-2014 (-0.01%/yr), Harrison County population in 2024 would be 8,940 [0].
Historical population of Harrison 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] +15.82 %/yr
[1860-1870] +3.25 %/yr
[1870-1880] +3.33 %/yr
[1880-1890] +0.35 %/yr
[1890-1900] +1.5 %/yr
[1900-1910] -1.74 %/yr
[1910-1920] -0.37 %/yr
[1920-1930] -1.34 %/yr
[1930-1940] -0.42 %/yr
[1940-1950] -1.57 %/yr
[1950-1960] -1.94 %/yr
[1960-1970] -1.23 %/yr
[1970-1980] -0.36 %/yr
[1980-1990] -1.54 %/yr
[1990-2000] +0.45 %/yr
[2000-2005] +0.08 %/yr
[2005-2010] +0.14 %/yr
[2010-2014] -0.01 %/yr
Looking for settlements in Harrison County? Visit this page: Settlements in Harrison County, MO
Population of Harrison County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 314 | 271 | 585 |
| 5 to 9 | 335 | 297 | 632 |
| 10 to 14 | 310 | 270 | 580 |
| 15 to 19 | 287 | 225 | 512 |
| 20 to 24 | 226 | 215 | 441 |
| 25 to 29 | 215 | 229 | 444 |
| 30 to 34 | 226 | 237 | 463 |
| 35 to 39 | 228 | 211 | 439 |
| 40 to 44 | 239 | 227 | 466 |
| 45 to 49 | 240 | 239 | 479 |
| 50 to 54 | 288 | 293 | 581 |
| 55 to 59 | 316 | 337 | 653 |
| 60 to 64 | 274 | 272 | 546 |
| 65 to 69 | 242 | 227 | 469 |
| 70 to 74 | 212 | 222 | 434 |
| 75 to 79 | 161 | 189 | 350 |
| 80 to 84 | 101 | 167 | 268 |
| 85+ | 90 | 207 | 297 |
Harrison 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 | 4235 | 4267 | 8,502 |
| NH | 4206 | 4242 | 8,448 |
| WA | 4201 | 4208 | 8,409 |
| NHWAC | 4147 | 4184 | 8,331 |
| NHWA | 4116 | 4134 | 8,250 |
| H | 98 | 93 | 191 |
| HWAC | 88 | 83 | 171 |
| HWA | 85 | 74 | 159 |
| TOM | 35 | 60 | 95 |
| IAC | 43 | 46 | 89 |
| NHTOM | 32 | 51 | 83 |
| BAC | 30 | 51 | 81 |
| NHIAC | 36 | 36 | 72 |
| NHBAC | 26 | 46 | 72 |
| AAC | 30 | 21 | 51 |
| IA | 25 | 20 | 45 |
| NHAAC | 28 | 16 | 44 |
| BA | 19 | 23 | 42 |
| AA | 24 | 14 | 38 |
| NHBA | 16 | 21 | 37 |
| NHAA | 22 | 12 | 34 |
| NHIA | 20 | 14 | 34 |
| HIAC | 7 | 10 | 17 |
| NAC | 2 | 12 | 14 |
| NHNAC | 2 | 12 | 14 |
| HTOM | 3 | 9 | 12 |
| HIA | 5 | 6 | 11 |
| NA | 0 | 10 | 10 |
| NHNA | 0 | 10 | 10 |
| HBAC | 4 | 5 | 9 |
| HAAC | 2 | 5 | 7 |
| HBA | 3 | 2 | 5 |
| HAA | 2 | 2 | 4 |
| HNAC | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
• Livingston County population
45.7 mi, 
149°
• DeKalb County
38.1 mi, 
215°
• Grundy County
27.7 mi, 
125°
• Daviess County
26.5 mi, 
177°
• Decatur County
29.1 mi, 
22°
• Gentry County
23.7 mi, 
246°
• Wayne County
44.1 mi, 
51°
• Ringgold County
30 mi, 
333°
• Mercer County
23 mi, 
76°
• Worth County
24.3 mi, 
292°
[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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