Johnson County Historical Age Data
ACS 2010-2014 data
Total population: 136,802
Median Age (
see rank)
| Johnson County | 29.70 years old |
| Iowa | 38.00 years old |
| U.S. | 37.40 years old |
Median Age, Male (
see rank)
| Johnson County | 29.30 years old |
| Iowa | 36.70 years old |
| U.S. | 36.10 years old |
Median Age, Female (
see rank)
| Johnson County | 30.30 years old |
| Iowa | 39.40 years old |
| U.S. | 38.80 years old |
| | Johnson County | % of the Total Population | Iowa | U.S. |
| Under 5 years | 8,397 | 6.14%, see rank | 6.39% | 6.36% |
| 5 to 9 years | 7,601 | 5.56%, see rank | 6.62% | 6.51% |
| 10 to 14 years | 7,264 | 5.31%, see rank | 6.58% | 6.59% |
| 15 to 19 years | 11,603 | 8.48%, see rank | 6.96% | 6.85% |
| 20 to 24 years | 21,678 | 15.85%, see rank | 7.21% | 7.13% |
| 25 to 34 years | 23,090 | 16.88%, see rank | 12.65% | 13.47% |
| 35 to 44 years | 15,681 | 11.46%, see rank | 11.80% | 12.96% |
| 45 to 54 years | 14,865 | 10.87%, see rank | 13.73% | 14.09% |
| 55 to 64 years | 14,183 | 10.37%, see rank | 12.80% | 12.29% |
| 65 to 74 years | 6,987 | 5.11%, see rank | 7.81% | 7.64% |
| 75 to 84 | 3,632 | 2.65%, see rank | 4.98% | 4.25% |
| 85 years and over | 1,821 | 1.33%, see rank | 2.48% | 1.85% |
US Census 2010 data
Total population: 130,882
Median Age (
see rank)
| Johnson County | 29.30 years old |
| Iowa | 38.10 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Johnson County | 28.80 years old |
| Iowa | 36.60 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Johnson County | 29.80 years old |
| Iowa | 39.50 years old |
| U.S. | 38.50 years old |
| | Johnson County | % of the Total Population | Iowa | U.S. |
| Under 5 years | 8,075 | 6.17%, see rank | 6.63% | 6.54% |
| 5 to 9 years | 7,286 | 5.57%, see rank | 6.59% | 6.59% |
| 10 to 14 years | 6,713 | 5.13%, see rank | 6.59% | 6.70% |
| 15 to 19 years | 10,920 | 8.34%, see rank | 7.12% | 7.14% |
| 20 to 24 years | 21,052 | 16.08%, see rank | 7.00% | 6.99% |
| 25 to 34 years | 22,496 | 17.19%, see rank | 12.56% | 13.30% |
| 35 to 44 years | 14,956 | 11.43%, see rank | 11.97% | 13.30% |
| 45 to 54 years | 15,128 | 11.56%, see rank | 14.43% | 14.58% |
| 55 to 64 years | 13,045 | 9.97%, see rank | 12.24% | 11.82% |
| 65 to 74 years | 6,135 | 4.69%, see rank | 7.37% | 7.03% |
| 75 to 84 | 3,477 | 2.66%, see rank | 5.04% | 4.23% |
| 85 years and over | 1,599 | 1.22%, see rank | 2.45% | 1.78% |
ACS 2008-2012 data
Total population: 131,627
Median Age (
see rank)
| Johnson County | 29.30 years old |
| Iowa | 38.00 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Johnson County | 28.80 years old |
| Iowa | 36.60 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Johnson County | 29.80 years old |
| Iowa | 39.40 years old |
| U.S. | 38.50 years old |
| | Johnson County | % of the Total Population | Iowa | U.S. |
| Under 5 years | 8,020 | 6.09%, see rank | 6.53% | 6.51% |
| 5 to 9 years | 7,038 | 5.35%, see rank | 6.58% | 6.57% |
| 10 to 14 years | 7,020 | 5.33%, see rank | 6.60% | 6.68% |
| 15 to 19 years | 11,161 | 8.48%, see rank | 7.14% | 7.09% |
| 20 to 24 years | 21,590 | 16.40%, see rank | 7.08% | 7.04% |
| 25 to 34 years | 22,169 | 16.84%, see rank | 12.55% | 13.32% |
| 35 to 44 years | 15,115 | 11.48%, see rank | 12.02% | 13.34% |
| 45 to 54 years | 15,037 | 11.42%, see rank | 14.28% | 14.44% |
| 55 to 64 years | 13,132 | 9.98%, see rank | 12.27% | 11.84% |
| 65 to 74 years | 6,270 | 4.76%, see rank | 7.45% | 7.12% |
| 75 to 84 | 3,408 | 2.59%, see rank | 5.08% | 4.25% |
| 85 years and over | 1,667 | 1.27%, see rank | 2.42% | 1.78% |
ACS 2006-2010 data
Total population: 126,994
Median Age (
see rank)
| Johnson County | 28.80 years old |
| Iowa | 38.00 years old |
| U.S. | 36.90 years old |
Median Age, Male (
see rank)
| Johnson County | 28.50 years old |
| Iowa | 36.60 years old |
| U.S. | 35.60 years old |
Median Age, Female (
see rank)
| Johnson County | 29.30 years old |
| Iowa | 39.30 years old |
| U.S. | 38.10 years old |
| | Johnson County | % of the Total Population | Iowa | U.S. |
| Under 5 years | 7,658 | 6.03%, see rank | 6.56% | 6.62% |
| 5 to 9 years | 6,938 | 5.46%, see rank | 6.57% | 6.62% |
| 10 to 14 years | 6,633 | 5.22%, see rank | 6.64% | 6.79% |
| 15 to 19 years | 11,004 | 8.66%, see rank | 7.28% | 7.28% |
| 20 to 24 years | 21,650 | 17.05%, see rank | 7.14% | 6.98% |
| 25 to 34 years | 20,756 | 16.34%, see rank | 12.25% | 13.22% |
| 35 to 44 years | 15,121 | 11.91%, see rank | 12.56% | 13.89% |
| 45 to 54 years | 14,913 | 11.74%, see rank | 14.61% | 14.57% |
| 55 to 64 years | 11,858 | 9.34%, see rank | 11.58% | 11.28% |
| 65 to 74 years | 5,588 | 4.40%, see rank | 7.21% | 6.74% |
| 75 to 84 | 3,398 | 2.68%, see rank | 5.24% | 4.30% |
| 85 years and over | 1,477 | 1.16%, see rank | 2.36% | 1.70% |
ACS 2005-2009 data
Total population: 125,810
Median Age (
see rank)
| Johnson County | 27.50 years old |
| Iowa | 37.90 years old |
| U.S. | 36.50 years old |
Median Age, Male (
see rank)
| Johnson County | 27.70 years old |
| Iowa | 36.50 years old |
| U.S. | 35.20 years old |
Median Age, Female (
see rank)
| Johnson County | 27.40 years old |
| Iowa | 39.30 years old |
| U.S. | 37.90 years old |
| | Johnson County | % of the Total Population | Iowa | U.S. |
| Under 5 years | 7,581 | 6.03%, see rank | 6.61% | 6.92% |
| 5 to 9 years | 6,687 | 5.32%, see rank | 6.38% | 6.59% |
| 10 to 14 years | 6,165 | 4.90%, see rank | 6.59% | 6.83% |
| 15 to 19 years | 12,069 | 9.59%, see rank | 7.37% | 7.15% |
| 20 to 24 years | 24,807 | 19.72%, see rank | 7.65% | 7.02% |
| 25 to 34 years | 17,253 | 13.71%, see rank | 11.90% | 13.42% |
| 35 to 44 years | 15,408 | 12.25%, see rank | 12.95% | 14.18% |
| 45 to 54 years | 14,837 | 11.79%, see rank | 14.71% | 14.48% |
| 55 to 64 years | 10,832 | 8.61%, see rank | 11.11% | 10.81% |
| 65 to 74 years | 5,341 | 4.25%, see rank | 7.05% | 6.50% |
| 75 to 84 | 3,379 | 2.69%, see rank | 5.30% | 4.40% |
| 85 years and over | 1,451 | 1.15%, see rank | 2.38% | 1.71% |
US Census 2000 data
Total population: 111,006
Median Age (
see rank)
| Johnson County | 28.40 years old |
| Iowa | 36.60 years old |
| U.S. | 35.30 years old |
Median Age, Male (
see rank)
| Johnson County | 28.00 years old |
| Iowa | 35.20 years old |
| U.S. | 34.00 years old |
Median Age, Female (
see rank)
| Johnson County | 28.90 years old |
| Iowa | 38.00 years old |
| U.S. | 36.50 years old |
| | Johnson County | % of the Total Population | Iowa | U.S. |
| Under 5 years | 6,428 | 5.79%, see rank | 6.44% | 6.81% |
| 5 to 9 years | 6,231 | 5.61%, see rank | 6.92% | 7.30% |
| 10 to 14 years | 6,032 | 5.43%, see rank | 7.19% | 7.29% |
| 15 to 19 years | 10,933 | 9.85%, see rank | 7.74% | 7.18% |
| 20 to 24 years | 18,701 | 16.85%, see rank | 6.96% | 6.74% |
| 25 to 34 years | 18,482 | 16.65%, see rank | 12.41% | 14.18% |
| 35 to 44 years | 15,685 | 14.13%, see rank | 15.21% | 16.04% |
| 45 to 54 years | 13,518 | 12.18%, see rank | 13.42% | 13.39% |
| 55 to 64 years | 6,731 | 6.06%, see rank | 8.80% | 8.63% |
| 65 to 74 years | 4,338 | 3.91%, see rank | 7.24% | 6.54% |
| 75 to 84 | 2,826 | 2.55%, see rank | 5.44% | 4.39% |
| 85 years and over | 1,101 | 0.99%, see rank | 2.23% | 1.51% |
* ACS stands for U.S. Census American Community Survey. According to the U.S. Census, if the date is a range, you can interpret the data as an average of the period of time.
