Jefferson County Historical Age Data
ACS 2010-2014 data
Total population: 18,932
Median Age (
see rank)
| Jefferson County | 43.50 years old |
| Kansas | 36.00 years old |
| U.S. | 37.40 years old |
Median Age, Male (
see rank)
| Jefferson County | 42.60 years old |
| Kansas | 34.70 years old |
| U.S. | 36.10 years old |
Median Age, Female (
see rank)
| Jefferson County | 44.40 years old |
| Kansas | 37.40 years old |
| U.S. | 38.80 years old |
| | Jefferson County | % of the Total Population | Kansas | U.S. |
| Under 5 years | 1,029 | 5.44%, see rank | 7.03% | 6.36% |
| 5 to 9 years | 1,253 | 6.62%, see rank | 7.08% | 6.51% |
| 10 to 14 years | 1,419 | 7.50%, see rank | 6.92% | 6.59% |
| 15 to 19 years | 1,286 | 6.79%, see rank | 7.03% | 6.85% |
| 20 to 24 years | 804 | 4.25%, see rank | 7.35% | 7.13% |
| 25 to 34 years | 1,880 | 9.93%, see rank | 13.33% | 13.47% |
| 35 to 44 years | 2,209 | 11.67%, see rank | 11.99% | 12.96% |
| 45 to 54 years | 3,171 | 16.75%, see rank | 13.40% | 14.09% |
| 55 to 64 years | 2,762 | 14.59%, see rank | 12.16% | 12.29% |
| 65 to 74 years | 1,790 | 9.45%, see rank | 7.20% | 7.64% |
| 75 to 84 | 902 | 4.76%, see rank | 4.38% | 4.25% |
| 85 years and over | 427 | 2.26%, see rank | 2.12% | 1.85% |
US Census 2010 data
Total population: 19,126
Median Age (
see rank)
| Jefferson County | 42.60 years old |
| Kansas | 36.00 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Jefferson County | 41.90 years old |
| Kansas | 34.70 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Jefferson County | 43.40 years old |
| Kansas | 37.40 years old |
| U.S. | 38.50 years old |
| | Jefferson County | % of the Total Population | Kansas | U.S. |
| Under 5 years | 1,097 | 5.74%, see rank | 7.20% | 6.54% |
| 5 to 9 years | 1,275 | 6.67%, see rank | 7.10% | 6.59% |
| 10 to 14 years | 1,448 | 7.57%, see rank | 6.97% | 6.70% |
| 15 to 19 years | 1,317 | 6.89%, see rank | 7.14% | 7.14% |
| 20 to 24 years | 803 | 4.20%, see rank | 7.17% | 6.99% |
| 25 to 34 years | 1,871 | 9.78%, see rank | 13.24% | 13.30% |
| 35 to 44 years | 2,394 | 12.52%, see rank | 12.15% | 13.30% |
| 45 to 54 years | 3,319 | 17.35%, see rank | 14.24% | 14.58% |
| 55 to 64 years | 2,650 | 13.86%, see rank | 11.61% | 11.82% |
| 65 to 74 years | 1,677 | 8.77%, see rank | 6.67% | 7.03% |
| 75 to 84 | 914 | 4.78%, see rank | 4.43% | 4.23% |
| 85 years and over | 361 | 1.89%, see rank | 2.08% | 1.78% |
ACS 2008-2012 data
Total population: 19,036
Median Age (
see rank)
| Jefferson County | 42.90 years old |
| Kansas | 36.00 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Jefferson County | 42.30 years old |
| Kansas | 34.70 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Jefferson County | 43.60 years old |
| Kansas | 37.50 years old |
| U.S. | 38.50 years old |
| | Jefferson County | % of the Total Population | Kansas | U.S. |
| Under 5 years | 1,142 | 6.00%, see rank | 7.11% | 6.51% |
| 5 to 9 years | 1,196 | 6.28%, see rank | 7.06% | 6.57% |
| 10 to 14 years | 1,401 | 7.36%, see rank | 6.97% | 6.68% |
| 15 to 19 years | 1,373 | 7.21%, see rank | 7.15% | 7.09% |
| 20 to 24 years | 753 | 3.96%, see rank | 7.24% | 7.04% |
| 25 to 34 years | 1,874 | 9.84%, see rank | 13.20% | 13.32% |
| 35 to 44 years | 2,348 | 12.33%, see rank | 12.23% | 13.34% |
| 45 to 54 years | 3,271 | 17.18%, see rank | 14.11% | 14.44% |
| 55 to 64 years | 2,707 | 14.22%, see rank | 11.66% | 11.84% |
| 65 to 74 years | 1,692 | 8.89%, see rank | 6.75% | 7.12% |
| 75 to 84 | 814 | 4.28%, see rank | 4.42% | 4.25% |
| 85 years and over | 465 | 2.44%, see rank | 2.10% | 1.78% |
ACS 2006-2010 data
Total population: 19,059
Median Age (
see rank)
| Jefferson County | 42.20 years old |
| Kansas | 36.10 years old |
| U.S. | 36.90 years old |
Median Age, Male (
see rank)
| Jefferson County | 41.70 years old |
| Kansas | 34.80 years old |
| U.S. | 35.60 years old |
Median Age, Female (
see rank)
| Jefferson County | 42.80 years old |
| Kansas | 37.50 years old |
| U.S. | 38.10 years old |
| | Jefferson County | % of the Total Population | Kansas | U.S. |
| Under 5 years | 1,186 | 6.22%, see rank | 7.09% | 6.62% |
| 5 to 9 years | 1,170 | 6.14%, see rank | 7.07% | 6.62% |
| 10 to 14 years | 1,391 | 7.30%, see rank | 6.98% | 6.79% |
| 15 to 19 years | 1,474 | 7.73%, see rank | 7.37% | 7.28% |
| 20 to 24 years | 861 | 4.52%, see rank | 7.31% | 6.98% |
| 25 to 34 years | 1,768 | 9.28%, see rank | 12.84% | 13.22% |
| 35 to 44 years | 2,521 | 13.23%, see rank | 12.73% | 13.89% |
| 45 to 54 years | 3,346 | 17.56%, see rank | 14.49% | 14.57% |
| 55 to 64 years | 2,521 | 13.23%, see rank | 11.03% | 11.28% |
| 65 to 74 years | 1,566 | 8.22%, see rank | 6.47% | 6.74% |
| 75 to 84 | 851 | 4.47%, see rank | 4.54% | 4.30% |
| 85 years and over | 404 | 2.12%, see rank | 2.08% | 1.70% |
ACS 2005-2009 data
Total population: 18,380
Median Age (
see rank)
| Jefferson County | 42.10 years old |
| Kansas | 35.90 years old |
| U.S. | 36.50 years old |
Median Age, Male (
see rank)
| Jefferson County | 41.50 years old |
| Kansas | 34.50 years old |
| U.S. | 35.20 years old |
Median Age, Female (
see rank)
| Jefferson County | 43.10 years old |
| Kansas | 37.40 years old |
| U.S. | 37.90 years old |
| | Jefferson County | % of the Total Population | Kansas | U.S. |
| Under 5 years | 1,050 | 5.71%, see rank | 7.15% | 6.92% |
| 5 to 9 years | 1,078 | 5.87%, see rank | 6.82% | 6.59% |
| 10 to 14 years | 1,283 | 6.98%, see rank | 6.88% | 6.83% |
| 15 to 19 years | 1,485 | 8.08%, see rank | 7.28% | 7.15% |
| 20 to 24 years | 993 | 5.40%, see rank | 7.95% | 7.02% |
| 25 to 34 years | 1,621 | 8.82%, see rank | 12.76% | 13.42% |
| 35 to 44 years | 2,562 | 13.94%, see rank | 13.08% | 14.18% |
| 45 to 54 years | 3,289 | 17.89%, see rank | 14.49% | 14.48% |
| 55 to 64 years | 2,400 | 13.06%, see rank | 10.61% | 10.81% |
| 65 to 74 years | 1,438 | 7.82%, see rank | 6.31% | 6.50% |
| 75 to 84 | 841 | 4.58%, see rank | 4.58% | 4.40% |
| 85 years and over | 340 | 1.85%, see rank | 2.09% | 1.71% |
US Census 2000 data
Total population: 18,426
Median Age (
see rank)
| Jefferson County | 38.00 years old |
| Kansas | 35.20 years old |
| U.S. | 35.30 years old |
Median Age, Male (
see rank)
| Jefferson County | 37.30 years old |
| Kansas | 33.70 years old |
| U.S. | 34.00 years old |
Median Age, Female (
see rank)
| Jefferson County | 38.70 years old |
| Kansas | 36.50 years old |
| U.S. | 36.50 years old |
| | Jefferson County | % of the Total Population | Kansas | U.S. |
| Under 5 years | 1,178 | 6.39%, see rank | 7.02% | 6.81% |
| 5 to 9 years | 1,329 | 7.21%, see rank | 7.27% | 7.30% |
| 10 to 14 years | 1,544 | 8.38%, see rank | 7.59% | 7.29% |
| 15 to 19 years | 1,498 | 8.13%, see rank | 7.82% | 7.18% |
| 20 to 24 years | 779 | 4.23%, see rank | 7.07% | 6.74% |
| 25 to 34 years | 1,997 | 10.84%, see rank | 12.98% | 14.18% |
| 35 to 44 years | 3,155 | 17.12%, see rank | 15.64% | 16.04% |
| 45 to 54 years | 2,708 | 14.70%, see rank | 13.17% | 13.39% |
| 55 to 64 years | 1,880 | 10.20%, see rank | 8.19% | 8.63% |
| 65 to 74 years | 1,224 | 6.64%, see rank | 6.54% | 6.54% |
| 75 to 84 | 811 | 4.40%, see rank | 4.78% | 4.39% |
| 85 years and over | 323 | 1.75%, see rank | 1.93% | 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.
