Johnson County Historical Age Data
ACS 2010-2014 data
Total population: 12,650
Median Age (
see rank)
| Johnson County | 42.80 years old |
| Illinois | 37.00 years old |
| U.S. | 37.40 years old |
Median Age, Male (
see rank)
| Johnson County | 40.40 years old |
| Illinois | 35.70 years old |
| U.S. | 36.10 years old |
Median Age, Female (
see rank)
| Johnson County | 46.00 years old |
| Illinois | 38.40 years old |
| U.S. | 38.80 years old |
| | Johnson County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 569 | 4.50%, see rank | 6.30% | 6.36% |
| 5 to 9 years | 530 | 4.19%, see rank | 6.58% | 6.51% |
| 10 to 14 years | 766 | 6.06%, see rank | 6.71% | 6.59% |
| 15 to 19 years | 709 | 5.60%, see rank | 6.94% | 6.85% |
| 20 to 24 years | 847 | 6.70%, see rank | 6.95% | 7.13% |
| 25 to 34 years | 1,652 | 13.06%, see rank | 13.84% | 13.47% |
| 35 to 44 years | 1,646 | 13.01%, see rank | 13.20% | 12.96% |
| 45 to 54 years | 1,877 | 14.84%, see rank | 14.17% | 14.09% |
| 55 to 64 years | 1,741 | 13.76%, see rank | 12.13% | 12.29% |
| 65 to 74 years | 1,403 | 11.09%, see rank | 7.18% | 7.64% |
| 75 to 84 | 702 | 5.55%, see rank | 4.10% | 4.25% |
| 85 years and over | 208 | 1.64%, see rank | 1.90% | 1.85% |
US Census 2010 data
Total population: 12,582
Median Age (
see rank)
| Johnson County | 42.20 years old |
| Illinois | 36.60 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Johnson County | 39.80 years old |
| Illinois | 35.20 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Johnson County | 45.40 years old |
| Illinois | 37.90 years old |
| U.S. | 38.50 years old |
| | Johnson County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 566 | 4.50%, see rank | 6.51% | 6.54% |
| 5 to 9 years | 695 | 5.52%, see rank | 6.70% | 6.59% |
| 10 to 14 years | 710 | 5.64%, see rank | 6.85% | 6.70% |
| 15 to 19 years | 815 | 6.48%, see rank | 7.19% | 7.14% |
| 20 to 24 years | 763 | 6.06%, see rank | 6.85% | 6.99% |
| 25 to 34 years | 1,566 | 12.45%, see rank | 13.84% | 13.30% |
| 35 to 44 years | 1,668 | 13.26%, see rank | 13.45% | 13.30% |
| 45 to 54 years | 1,922 | 15.28%, see rank | 14.58% | 14.58% |
| 55 to 64 years | 1,710 | 13.59%, see rank | 11.48% | 11.82% |
| 65 to 74 years | 1,295 | 10.29%, see rank | 6.62% | 7.03% |
| 75 to 84 | 653 | 5.19%, see rank | 4.09% | 4.23% |
| 85 years and over | 219 | 1.74%, see rank | 1.83% | 1.78% |
ACS 2008-2012 data
Total population: 12,653
Median Age (
see rank)
| Johnson County | 42.00 years old |
| Illinois | 36.60 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Johnson County | 40.20 years old |
| Illinois | 35.30 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Johnson County | 45.50 years old |
| Illinois | 38.00 years old |
| U.S. | 38.50 years old |
| | Johnson County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 590 | 4.66%, see rank | 6.50% | 6.51% |
| 5 to 9 years | 482 | 3.81%, see rank | 6.68% | 6.57% |
| 10 to 14 years | 839 | 6.63%, see rank | 6.82% | 6.68% |
| 15 to 19 years | 763 | 6.03%, see rank | 7.16% | 7.09% |
| 20 to 24 years | 819 | 6.47%, see rank | 6.88% | 7.04% |
| 25 to 34 years | 1,621 | 12.81%, see rank | 13.84% | 13.32% |
| 35 to 44 years | 1,770 | 13.99%, see rank | 13.49% | 13.34% |
| 45 to 54 years | 1,915 | 15.13%, see rank | 14.46% | 14.44% |
| 55 to 64 years | 1,690 | 13.36%, see rank | 11.52% | 11.84% |
| 65 to 74 years | 1,304 | 10.31%, see rank | 6.71% | 7.12% |
| 75 to 84 | 631 | 4.99%, see rank | 4.11% | 4.25% |
| 85 years and over | 229 | 1.81%, see rank | 1.83% | 1.78% |
ACS 2006-2010 data
Total population: 12,710
Median Age (
see rank)
| Johnson County | 40.30 years old |
| Illinois | 36.20 years old |
| U.S. | 36.90 years old |
Median Age, Male (
see rank)
| Johnson County | 36.00 years old |
| Illinois | 34.90 years old |
| U.S. | 35.60 years old |
Median Age, Female (
see rank)
| Johnson County | 44.80 years old |
| Illinois | 37.60 years old |
| U.S. | 38.10 years old |
| | Johnson County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 605 | 4.76%, see rank | 6.63% | 6.62% |
| 5 to 9 years | 544 | 4.28%, see rank | 6.78% | 6.62% |
| 10 to 14 years | 861 | 6.77%, see rank | 6.94% | 6.79% |
| 15 to 19 years | 804 | 6.33%, see rank | 7.31% | 7.28% |
| 20 to 24 years | 914 | 7.19%, see rank | 6.86% | 6.98% |
| 25 to 34 years | 1,890 | 14.87%, see rank | 13.78% | 13.22% |
| 35 to 44 years | 1,675 | 13.18%, see rank | 13.96% | 13.89% |
| 45 to 54 years | 1,660 | 13.06%, see rank | 14.55% | 14.57% |
| 55 to 64 years | 1,679 | 13.21%, see rank | 10.89% | 11.28% |
| 65 to 74 years | 1,246 | 9.80%, see rank | 6.36% | 6.74% |
| 75 to 84 | 573 | 4.51%, see rank | 4.17% | 4.30% |
| 85 years and over | 259 | 2.04%, see rank | 1.77% | 1.70% |
ACS 2005-2009 data
Total population: 13,653
Median Age (
see rank)
| Johnson County | 38.30 years old |
| Illinois | 35.90 years old |
| U.S. | 36.50 years old |
Median Age, Male (
see rank)
| Johnson County | 34.70 years old |
| Illinois | 34.60 years old |
| U.S. | 35.20 years old |
Median Age, Female (
see rank)
| Johnson County | 44.10 years old |
| Illinois | 37.20 years old |
| U.S. | 37.90 years old |
| | Johnson County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 618 | 4.53%, see rank | 6.97% | 6.92% |
| 5 to 9 years | 599 | 4.39%, see rank | 6.76% | 6.59% |
| 10 to 14 years | 771 | 5.65%, see rank | 6.96% | 6.83% |
| 15 to 19 years | 813 | 5.95%, see rank | 7.24% | 7.15% |
| 20 to 24 years | 1,185 | 8.68%, see rank | 7.08% | 7.02% |
| 25 to 34 years | 2,314 | 16.95%, see rank | 13.73% | 13.42% |
| 35 to 44 years | 2,111 | 15.46%, see rank | 14.23% | 14.18% |
| 45 to 54 years | 1,773 | 12.99%, see rank | 14.47% | 14.48% |
| 55 to 64 years | 1,556 | 11.40%, see rank | 10.43% | 10.81% |
| 65 to 74 years | 1,128 | 8.26%, see rank | 6.21% | 6.50% |
| 75 to 84 | 550 | 4.03%, see rank | 4.17% | 4.40% |
| 85 years and over | 235 | 1.72%, see rank | 1.74% | 1.71% |
US Census 2000 data
Total population: 12,878
Median Age (
see rank)
| Johnson County | 36.70 years old |
| Illinois | 34.70 years old |
| U.S. | 35.30 years old |
Median Age, Male (
see rank)
| Johnson County | 34.50 years old |
| Illinois | 33.30 years old |
| U.S. | 34.00 years old |
Median Age, Female (
see rank)
| Johnson County | 41.40 years old |
| Illinois | 36.00 years old |
| U.S. | 36.50 years old |
| | Johnson County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 604 | 4.69%, see rank | 7.06% | 6.81% |
| 5 to 9 years | 654 | 5.08%, see rank | 7.49% | 7.30% |
| 10 to 14 years | 673 | 5.23%, see rank | 7.29% | 7.29% |
| 15 to 19 years | 827 | 6.42%, see rank | 7.20% | 7.18% |
| 20 to 24 years | 1,074 | 8.34%, see rank | 6.85% | 6.74% |
| 25 to 34 years | 2,235 | 17.36%, see rank | 14.59% | 14.18% |
| 35 to 44 years | 2,147 | 16.67%, see rank | 15.97% | 16.04% |
| 45 to 54 years | 1,593 | 12.37%, see rank | 13.10% | 13.39% |
| 55 to 64 years | 1,325 | 10.29%, see rank | 8.38% | 8.63% |
| 65 to 74 years | 977 | 7.59%, see rank | 6.22% | 6.54% |
| 75 to 84 | 591 | 4.59%, see rank | 4.31% | 4.39% |
| 85 years and over | 178 | 1.38%, see rank | 1.55% | 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.
