Last official estimated population of Stephenson County was 47,680 (year 2014)[1]. This was 0.015% of total US population and 0.4% of total Illinois state population. Area of Stephenson County is 565.1 mi² (=1463.6 km²), in this year population density was 84.38 p/mi². If population growth rate would be same as in period 2010-2014 (-0.02%/yr), Stephenson County population in 2024 would be 47,603 [0].
Historical population of Stephenson 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] +15.34 %/yr
[1850-1860] +7.97 %/yr
[1860-1870] +2 %/yr
[1870-1880] +0.43 %/yr
[1880-1890] -0.2 %/yr
[1890-1900] +1.09 %/yr
[1900-1910] +0.53 %/yr
[1910-1920] +0.25 %/yr
[1920-1930] +0.6 %/yr
[1930-1940] +0.14 %/yr
[1940-1950] +0.23 %/yr
[1950-1960] +1.06 %/yr
[1960-1970] +0.56 %/yr
[1970-1980] +0.14 %/yr
[1980-1990] -0.3 %/yr
[1990-2000] +0.19 %/yr
[2000-2005] -0.37 %/yr
[2005-2010] -0.16 %/yr
[2010-2014] -0.02 %/yr
Looking for settlements in Stephenson County? Visit this page: Settlements in Stephenson County, IL
Population of Stephenson County by age groups male (M) and female (F)[1b]
Age Gr. | (M) | (F) | Total |
0 to 4 | 1323 | 1290 | 2,613 |
5 to 9 | 1398 | 1430 | 2,828 |
10 to 14 | 1496 | 1395 | 2,891 |
15 to 19 | 1423 | 1365 | 2,788 |
20 to 24 | 1395 | 1327 | 2,722 |
25 to 29 | 1137 | 1213 | 2,350 |
30 to 34 | 1164 | 1260 | 2,424 |
35 to 39 | 1060 | 1180 | 2,240 |
40 to 44 | 1325 | 1279 | 2,604 |
45 to 49 | 1476 | 1488 | 2,964 |
50 to 54 | 1734 | 1853 | 3,587 |
55 to 59 | 1791 | 1806 | 3,597 |
60 to 64 | 1618 | 1686 | 3,304 |
65 to 69 | 1294 | 1431 | 2,725 |
70 to 74 | 999 | 1165 | 2,164 |
75 to 79 | 785 | 950 | 1,735 |
80 to 84 | 581 | 753 | 1,334 |
85+ | 476 | 1089 | 1,565 |
Stephenson 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 | 21652 | 23139 | 44,791 |
WAC | 20062 | 21394 | 41,456 |
WA | 19533 | 20786 | 40,319 |
NHWAC | 19336 | 20655 | 39,991 |
NHWA | 18841 | 20077 | 38,918 |
BAC | 2587 | 2779 | 5,366 |
NHBAC | 2503 | 2697 | 5,200 |
BA | 2165 | 2305 | 4,470 |
NHBA | 2105 | 2244 | 4,349 |
H | 823 | 821 | 1,644 |
HWAC | 726 | 739 | 1,465 |
HWA | 692 | 709 | 1,401 |
TOM | 558 | 631 | 1,189 |
NHTOM | 521 | 599 | 1,120 |
AAC | 226 | 258 | 484 |
NHAAC | 219 | 254 | 473 |
AA | 152 | 172 | 324 |
NHAA | 149 | 170 | 319 |
IAC | 138 | 154 | 292 |
NHIAC | 98 | 127 | 225 |
HBAC | 84 | 82 | 166 |
HBA | 60 | 61 | 121 |
IA | 54 | 57 | 111 |
HTOM | 37 | 32 | 69 |
HIAC | 40 | 27 | 67 |
NHIA | 26 | 40 | 66 |
HIA | 28 | 17 | 45 |
NAC | 26 | 19 | 45 |
NHNAC | 22 | 18 | 40 |
NA | 13 | 9 | 22 |
NHNA | 10 | 9 | 19 |
HAAC | 7 | 4 | 11 |
HNAC | 4 | 1 | 5 |
HAA | 3 | 2 | 5 |
HNA | 3 | 0 | 3 |
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[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
*Jo Daviess Illinois Notes
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