Population.us > Counties > Iowa > Johnson County

Population of Johnson County

Last official estimated population of Johnson County was 131,267 (year 2014)[1]. This was 0.041% of total US population and 4.2% of total Iowa state population. Area of Johnson County is 623.2 mi² (=1614 km²), in this year population density was 210.65 p/mi². If population growth rate would be same as in period 2010-2014 (+0.07%/yr), Johnson County population in 2024 would be 132,234 [0].


Historical population

Historical population of Johnson County for period 1840-2014 [1] , [2] , [3]:

Maps: Population, population density, population changes

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.

PopulationDensityChangesLegendsPosition

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Annual growth rate

[1840-1850] +11.61 %/yr
[1850-1860] +14.67 %/yr
[1860-1870] +3.55 %/yr
[1870-1880] +0.21 %/yr
[1880-1890] -0.96 %/yr
[1890-1900] +0.73 %/yr
[1900-1910] +0.43 %/yr
[1910-1920] +0.21 %/yr
[1920-1930] +1.36 %/yr
[1930-1940] +0.92 %/yr
[1940-1950] +3.26 %/yr
[1950-1960] +1.61 %/yr
[1960-1970] +3 %/yr
[1970-1980] +1.26 %/yr
[1980-1990] +1.64 %/yr
[1990-2000] +1.45 %/yr
[2000-2005] +1.63 %/yr
[2005-2010] +1.7 %/yr
[2010-2014] +0.07 %/yr

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Demography

Population of Johnson County by age groups male (M) and female (F)[1b]

Age Gr. (M) (F) Total
0 to 4 4619 4155 8,774
5 to 9 4185 3996 8,181
10 to 14 3854 3798 7,652
15 to 19 5735 6094 11,829
20 to 24 10936 11078 22,014
25 to 29 6661 5912 12,573
30 to 34 5541 5445 10,986
35 to 39 4598 4187 8,785
40 to 44 3947 3762 7,709
45 to 49 3670 3702 7,372
50 to 54 3723 3873 7,596
55 to 59 3701 3874 7,575
60 to 64 3438 3681 7,119
65 to 69 2459 2609 5,068
70 to 74 1529 1672 3,201
75 to 79 999 1247 2,246
80 to 84 651 949 1,600
85+ 646 1361 2,007

Johnson 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 66944 67483 134,427
WAC 62072 62624 124,696
WA 60515 60981 121,496
NHWAC 58426 59048 117,474
NHWA 57021 57632 114,653
BAC 5109 4807 9,916
AAC 4738 5076 9,814
NHAAC 4633 4951 9,584
NHBAC 4914 4565 9,479
AA 4096 4415 8,511
BA 4351 4030 8,381
NHAA 4033 4343 8,376
NHBA 4223 3890 8,113
H 3948 3912 7,860
HWAC 3646 3576 7,222
HWA 3494 3349 6,843
TOM 1655 1746 3,401
NHTOM 1489 1494 2,983
IAC 631 619 1,250
NHIAC 459 396 855
HBAC 195 242 437
IA 244 188 432
HTOM 166 252 418
HIAC 172 223 395
HBA 128 140 268
NHIA 156 101 257
HAAC 105 125 230
NAC 108 117 225
NHNAC 89 89 178
HIA 88 87 175
HAA 63 72 135
NA 31 35 66
HNAC 19 28 47
NHNA 22 23 45
HNA 9 12 21

Counties near Johnson County

Linn County population 28.3 mi, 359°
Muscatine County 27.5 mi, 117°
Benton County 37.9 mi, 320°
Washington County 24.5 mi, 196°
Jones County 39.8 mi, 37°
Henry County 47.2 mi, 177°
Cedar County 24.6 mi, 73°
Iowa County 24.3 mi, 272°
Louisa County 35.6 mi, 151°
Keokuk County 38 mi, 232°


Sources, notices

[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

Iowa Notes

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