Last official estimated population of Jefferson County was 16,816 (year 2014)[1]. This was 0.005% of total US population and 0.5% of total Iowa state population. Area of Jefferson County is 436.9 mi² (=1131.5 km²), in this year population density was 38.49 p/mi². If population growth rate would be same as in period 2010-2014 (-0.04%/yr), Jefferson County population in 2024 would be 16,749 [0].
Historical population of Jefferson 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] +13.58 %/yr
[1850-1860] +4.26 %/yr
[1860-1870] +1.72 %/yr
[1870-1880] -0.21 %/yr
[1880-1890] -1.39 %/yr
[1890-1900] +1.39 %/yr
[1900-1910] -0.89 %/yr
[1910-1920] +0.3 %/yr
[1920-1930] -0.12 %/yr
[1930-1940] -0.3 %/yr
[1940-1950] -0.04 %/yr
[1950-1960] +0.08 %/yr
[1960-1970] -0.03 %/yr
[1970-1980] +0.34 %/yr
[1980-1990] -0 %/yr
[1990-2000] -0.08 %/yr
[2000-2005] +0.17 %/yr
[2005-2010] +0.64 %/yr
[2010-2014] -0.04 %/yr
Looking for settlements in Jefferson County? Visit this page: Settlements in Jefferson County, IA
Population of Jefferson County by age groups male (M) and female (F)[1b]
Age Gr. | (M) | (F) | Total |
0 to 4 | 391 | 350 | 741 |
5 to 9 | 409 | 384 | 793 |
10 to 14 | 411 | 436 | 847 |
15 to 19 | 446 | 421 | 867 |
20 to 24 | 1350 | 453 | 1,803 |
25 to 29 | 854 | 421 | 1,275 |
30 to 34 | 573 | 444 | 1,017 |
35 to 39 | 460 | 379 | 839 |
40 to 44 | 441 | 412 | 853 |
45 to 49 | 383 | 439 | 822 |
50 to 54 | 528 | 557 | 1,085 |
55 to 59 | 696 | 678 | 1,374 |
60 to 64 | 922 | 837 | 1,759 |
65 to 69 | 651 | 664 | 1,315 |
70 to 74 | 319 | 339 | 658 |
75 to 79 | 211 | 232 | 443 |
80 to 84 | 124 | 228 | 352 |
85+ | 171 | 311 | 482 |
Jefferson 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 | 9085 | 7734 | 16,819 |
WAC | 7542 | 7532 | 15,074 |
WA | 7417 | 7406 | 14,823 |
NHWAC | 7317 | 7302 | 14,619 |
NHWA | 7207 | 7185 | 14,392 |
AAC | 1603 | 323 | 1,926 |
NHAAC | 1593 | 318 | 1,911 |
AA | 1568 | 295 | 1,863 |
NHAA | 1561 | 291 | 1,852 |
H | 255 | 251 | 506 |
HWAC | 225 | 230 | 455 |
HWA | 210 | 221 | 431 |
BAC | 247 | 165 | 412 |
NHBAC | 227 | 150 | 377 |
BA | 203 | 118 | 321 |
NHBA | 188 | 107 | 295 |
TOM | 131 | 132 | 263 |
NHTOM | 115 | 123 | 238 |
IAC | 77 | 92 | 169 |
NHIAC | 61 | 84 | 145 |
IA | 18 | 28 | 46 |
HBAC | 20 | 15 | 35 |
NHIA | 11 | 24 | 35 |
HBA | 15 | 11 | 26 |
HTOM | 16 | 9 | 25 |
HIAC | 16 | 8 | 24 |
NAC | 13 | 11 | 24 |
NHNAC | 11 | 9 | 20 |
HAAC | 10 | 5 | 15 |
HIA | 7 | 4 | 11 |
HAA | 7 | 4 | 11 |
NA | 3 | 6 | 9 |
NHNA | 3 | 4 | 7 |
HNAC | 2 | 2 | 4 |
HNA | 0 | 2 | 2 |
• Des Moines County population
41.2 mi, 98°
• Lee County
35.7 mi, 134°
• Wapello County
23.1 mi, 274°
• Washington County
25.6 mi, 29°
• Henry County
22.1 mi, 93°
• Louisa County
39.7 mi, 68°
• Keokuk County
24.7 mi, 335°
• Davis County
29.3 mi, 232°
• Van Buren County
17.5 mi, 177°
• Scotland County
39.7 mi, 193°
[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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