Population.us > Counties > Iowa > Washington County

Population of Washington County

Last official estimated population of Washington County was 21,696 (year 2014)[1]. This was 0.007% of total US population and 0.7% of total Iowa state population. Area of Washington County is 570.9 mi² (=1478.7 km²), in this year population density was 38.00 p/mi². If population growth rate would be same as in period 2010-2014 (-0.01%/yr), Washington County population in 2024 would be 21,676 [0].


Historical population

Historical population of Washington 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] +12.01 %/yr
[1850-1860] +11.13 %/yr
[1860-1870] +2.9 %/yr
[1870-1880] +0.73 %/yr
[1880-1890] -0.98 %/yr
[1890-1900] +1.16 %/yr
[1900-1910] -0.39 %/yr
[1910-1920] +0.25 %/yr
[1920-1930] -0.3 %/yr
[1930-1940] +0.12 %/yr
[1940-1950] -0.25 %/yr
[1950-1960] -0.08 %/yr
[1960-1970] -0.23 %/yr
[1970-1980] +0.6 %/yr
[1980-1990] -0.27 %/yr
[1990-2000] +0.53 %/yr
[2000-2005] +0.64 %/yr
[2005-2010] +0.33 %/yr
[2010-2014] -0.01 %/yr

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Demography

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

Age Gr. (M) (F) Total
0 to 4 755 703 1,458
5 to 9 739 750 1,489
10 to 14 845 743 1,588
15 to 19 701 721 1,422
20 to 24 626 551 1,177
25 to 29 536 568 1,104
30 to 34 637 638 1,275
35 to 39 616 616 1,232
40 to 44 594 626 1,220
45 to 49 716 717 1,433
50 to 54 800 797 1,597
55 to 59 785 777 1,562
60 to 64 702 732 1,434
65 to 69 595 606 1,201
70 to 74 415 456 871
75 to 79 339 367 706
80 to 84 242 347 589
85+ 222 490 712

Washington 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
WAC 10640 11009 21,649
WA 10506 10887 21,393
NH 10226 10608 20,834
NHWAC 10035 10430 20,465
NHWA 9919 10326 20,245
H 639 597 1,236
HWAC 605 579 1,184
HWA 587 561 1,148
BAC 197 137 334
NHBAC 174 124 298
TOM 138 129 267
NHTOM 119 110 229
BA 125 82 207
NHBA 111 74 185
AAC 74 101 175
NHAAC 68 98 166
IAC 81 83 164
NHIAC 60 64 124
AA 43 74 117
NHAA 41 74 115
IA 41 27 68
NHIA 26 19 45
HIAC 21 19 40
HTOM 19 19 38
HBAC 23 13 36
NAC 17 12 29
HIA 15 8 23
HBA 14 8 22
NHNAC 13 9 22
NA 12 6 18
NHNA 10 5 15
HAAC 6 3 9
HNAC 4 3 7
HNA 2 1 3
HAA 2 0 2

Counties near Washington County

Johnson County population 24.5 mi, 16°
Muscatine County 33.2 mi, 71°
Des Moines County 40 mi, 135°
Wapello County 41.1 mi, 239°
Henry County 25.5 mi, 158°
Jefferson County 25.6 mi, 209°
Iowa County 30 mi, 324°
Louisa County 25.5 mi, 107°
Keokuk County 23 mi, 270°
Van Buren County 41.5 mi, 196°


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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