Last official estimated population of Franklin County was 101,537 (year 2014)[1]. This was 0.032% of total US population and 1.7% of total Missouri state population. Area of Franklin County is 930.7 mi² (=2410.5 km²), in this year population density was 109.10 p/mi². If population growth rate would be same as in period 2010-2014 (+0.01%/yr), Franklin County population in 2026 would be 101,672 [0].
Historical population of Franklin 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] +3.89 %/yr
[1830-1840] +7.99 %/yr
[1840-1850] +3.9 %/yr
[1850-1860] +5.08 %/yr
[1860-1870] +5.23 %/yr
[1870-1880] -1.25 %/yr
[1880-1890] +0.56 %/yr
[1890-1900] +0.87 %/yr
[1900-1910] -0.25 %/yr
[1910-1920] -0.48 %/yr
[1920-1930] +0.71 %/yr
[1930-1940] +1.05 %/yr
[1940-1950] +0.63 %/yr
[1950-1960] +2.14 %/yr
[1960-1970] +2.15 %/yr
[1970-1980] +2.6 %/yr
[1980-1990] +1.24 %/yr
[1990-2000] +1.53 %/yr
[2000-2005] +0.96 %/yr
[2005-2010] +0.62 %/yr
[2010-2014] +0.01 %/yr
Looking for settlements in Franklin County? Visit this page: Settlements in Franklin County, MO
Population of Franklin County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 3305 | 3014 | 6,319 |
| 5 to 9 | 3430 | 3217 | 6,647 |
| 10 to 14 | 3567 | 3377 | 6,944 |
| 15 to 19 | 3311 | 3061 | 6,372 |
| 20 to 24 | 3128 | 3129 | 6,257 |
| 25 to 29 | 3122 | 2980 | 6,102 |
| 30 to 34 | 3151 | 3044 | 6,195 |
| 35 to 39 | 2768 | 2692 | 5,460 |
| 40 to 44 | 3091 | 3186 | 6,277 |
| 45 to 49 | 3540 | 3597 | 7,137 |
| 50 to 54 | 4176 | 4176 | 8,352 |
| 55 to 59 | 3889 | 3949 | 7,838 |
| 60 to 64 | 3086 | 3156 | 6,242 |
| 65 to 69 | 2486 | 2729 | 5,215 |
| 70 to 74 | 1878 | 2092 | 3,970 |
| 75 to 79 | 1270 | 1577 | 2,847 |
| 80 to 84 | 853 | 1158 | 2,011 |
| 85+ | 635 | 1264 | 1,899 |
Franklin 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 | 49800 | 50548 | 100,348 |
| WAC | 49665 | 50423 | 100,088 |
| WA | 49038 | 49837 | 98,875 |
| NHWAC | 48829 | 49638 | 98,467 |
| NHWA | 48240 | 49089 | 97,329 |
| H | 886 | 850 | 1,736 |
| HWAC | 836 | 785 | 1,621 |
| BAC | 849 | 718 | 1,567 |
| HWA | 798 | 748 | 1,546 |
| NHBAC | 827 | 690 | 1,517 |
| TOM | 652 | 613 | 1,265 |
| NHTOM | 612 | 575 | 1,187 |
| BA | 600 | 454 | 1,054 |
| NHBA | 590 | 443 | 1,033 |
| IAC | 495 | 458 | 953 |
| NHIAC | 438 | 394 | 832 |
| AAC | 301 | 387 | 688 |
| NHAAC | 295 | 379 | 674 |
| AA | 185 | 276 | 461 |
| NHAA | 182 | 272 | 454 |
| IA | 191 | 189 | 380 |
| NHIA | 161 | 146 | 307 |
| HIAC | 57 | 64 | 121 |
| NAC | 46 | 47 | 93 |
| NHNAC | 40 | 39 | 79 |
| HTOM | 40 | 38 | 78 |
| HIA | 30 | 43 | 73 |
| HBAC | 22 | 28 | 50 |
| NA | 20 | 29 | 49 |
| NHNA | 15 | 23 | 38 |
| HBA | 10 | 11 | 21 |
| HNAC | 6 | 8 | 14 |
| HAAC | 6 | 8 | 14 |
| HNA | 5 | 6 | 11 |
| HAA | 3 | 4 | 7 |
• St. Louis County population
37.5 mi, 
64°
• St. Charles County
33.6 mi, 
39°
• Jefferson County
30.5 mi, 
109°
• Lincoln County
45.6 mi, 
7°
• Warren County
24.9 mi, 
349°
• Washington County
33.6 mi, 
163°
• Crawford County
33.2 mi, 
203°
• Gasconade County
23.5 mi, 
275°
• Osage County
42.7 mi, 275°
• Montgomery County
42.1 mi, 
329°
[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
See note 3 Missouri Notes
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