Last official estimated population of Pike County was 18,486 (year 2014)[1]. This was 0.006% of total US population and 0.3% of total Missouri state population. Area of Pike County is 684.7 mi² (=1773.4 km²), in this year population density was 27.00 p/mi². If population growth rate would be same as in period 2010-2014 (-0.04%/yr), Pike County population in 2026 would be 18,396 [0].
Historical population of Pike County for period 1820-2014 [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
[1820-1830] +5.04 %/yr
[1830-1840] +5.68 %/yr
[1840-1850] +2.49 %/yr
[1850-1860] +3.07 %/yr
[1860-1870] +2.28 %/yr
[1870-1880] +1.48 %/yr
[1880-1890] -0.15 %/yr
[1890-1900] -0.22 %/yr
[1900-1910] -1.31 %/yr
[1910-1920] -1.03 %/yr
[1920-1930] -1.22 %/yr
[1930-1940] +0.18 %/yr
[1940-1950] -0.84 %/yr
[1950-1960] -0.08 %/yr
[1960-1970] +0.13 %/yr
[1970-1980] +0.37 %/yr
[1980-1990] -0.95 %/yr
[1990-2000] +1.4 %/yr
[2000-2005] +0.41 %/yr
[2005-2010] -0.22 %/yr
[2010-2014] -0.04 %/yr
Looking for settlements in Pike County? Visit this page: Settlements in Pike County, MO
Population of Pike County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 569 | 518 | 1,087 |
| 5 to 9 | 594 | 559 | 1,153 |
| 10 to 14 | 591 | 558 | 1,149 |
| 15 to 19 | 551 | 473 | 1,024 |
| 20 to 24 | 779 | 496 | 1,275 |
| 25 to 29 | 806 | 454 | 1,260 |
| 30 to 34 | 732 | 511 | 1,243 |
| 35 to 39 | 688 | 438 | 1,126 |
| 40 to 44 | 716 | 441 | 1,157 |
| 45 to 49 | 771 | 472 | 1,243 |
| 50 to 54 | 753 | 611 | 1,364 |
| 55 to 59 | 695 | 604 | 1,299 |
| 60 to 64 | 579 | 519 | 1,098 |
| 65 to 69 | 454 | 485 | 939 |
| 70 to 74 | 385 | 398 | 783 |
| 75 to 79 | 254 | 296 | 550 |
| 80 to 84 | 182 | 227 | 409 |
| 85+ | 138 | 244 | 382 |
Pike 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 | 9982 | 8154 | 18,136 |
| WAC | 9042 | 7961 | 17,003 |
| WA | 8913 | 7848 | 16,761 |
| NHWAC | 8805 | 7817 | 16,622 |
| NHWA | 8681 | 7711 | 16,392 |
| BAC | 1212 | 351 | 1,563 |
| NHBAC | 1202 | 342 | 1,544 |
| BA | 1127 | 283 | 1,410 |
| NHBA | 1118 | 277 | 1,395 |
| H | 255 | 150 | 405 |
| HWAC | 237 | 144 | 381 |
| HWA | 232 | 137 | 369 |
| TOM | 140 | 119 | 259 |
| NHTOM | 135 | 112 | 247 |
| IAC | 73 | 57 | 130 |
| NHIAC | 60 | 54 | 114 |
| AAC | 43 | 54 | 97 |
| NHAAC | 42 | 53 | 95 |
| AA | 23 | 34 | 57 |
| NHAA | 23 | 34 | 57 |
| IA | 31 | 19 | 50 |
| NHIA | 22 | 19 | 41 |
| HBAC | 10 | 9 | 19 |
| HIAC | 13 | 3 | 16 |
| NAC | 11 | 4 | 15 |
| NHNAC | 11 | 4 | 15 |
| HBA | 9 | 6 | 15 |
| HTOM | 5 | 7 | 12 |
| HIA | 9 | 0 | 9 |
| NA | 3 | 1 | 4 |
| NHNA | 3 | 1 | 4 |
| HAAC | 1 | 1 | 2 |
| HNAC | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
| HAA | 0 | 0 | 0 |
• Lincoln County population
22.2 mi, 
149°
• Warren County
39.9 mi, 
179°
• Marion County
40.7 mi, 
322°
• Audrain County
37 mi, 
256°
• Pike County
24.8 mi, 
37°
• Greene County
41.9 mi, 
88°
• Montgomery County
32.1 mi, 
209°
• Ralls County
23.9 mi, 
308°
• Scott County
42.3 mi, 
60°
• Calhoun County
29.6 mi, 
114°
[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
*St. Charles Missouri Notes
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