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 of Johnson 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] +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
Looking for settlements in Johnson County? Visit this page: Settlements in Johnson County, IA
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 |
• 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°
[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
Page generated in 0.005 seconds© 2016 population.us | Terms of use | Contact
Population.us
