Jefferson County Historical Age Data
ACS 2010-2014 data
Total population: 220,558
Median Age (
see rank)
| Jefferson County | 38.40 years old |
| Missouri | 38.10 years old |
| U.S. | 37.40 years old |
Median Age, Male (
see rank)
| Jefferson County | 37.50 years old |
| Missouri | 36.70 years old |
| U.S. | 36.10 years old |
Median Age, Female (
see rank)
| Jefferson County | 39.30 years old |
| Missouri | 39.50 years old |
| U.S. | 38.80 years old |
| | Jefferson County | % of the Total Population | Missouri | U.S. |
| Under 5 years | 14,278 | 6.47%, see rank | 6.29% | 6.36% |
| 5 to 9 years | 15,899 | 7.21%, see rank | 6.50% | 6.51% |
| 10 to 14 years | 14,670 | 6.65%, see rank | 6.55% | 6.59% |
| 15 to 19 years | 14,207 | 6.44%, see rank | 6.78% | 6.85% |
| 20 to 24 years | 13,131 | 5.95%, see rank | 7.04% | 7.13% |
| 25 to 34 years | 28,366 | 12.86%, see rank | 13.15% | 13.47% |
| 35 to 44 years | 29,485 | 13.37%, see rank | 12.20% | 12.96% |
| 45 to 54 years | 34,973 | 15.86%, see rank | 14.18% | 14.09% |
| 55 to 64 years | 28,558 | 12.95%, see rank | 12.67% | 12.29% |
| 65 to 74 years | 16,748 | 7.59%, see rank | 8.07% | 7.64% |
| 75 to 84 | 7,887 | 3.58%, see rank | 4.59% | 4.25% |
| 85 years and over | 2,356 | 1.07%, see rank | 1.98% | 1.85% |
US Census 2010 data
Total population: 218,733
Median Age (
see rank)
| Jefferson County | 37.80 years old |
| Missouri | 37.90 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Jefferson County | 36.90 years old |
| Missouri | 36.50 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Jefferson County | 38.70 years old |
| Missouri | 39.20 years old |
| U.S. | 38.50 years old |
| | Jefferson County | % of the Total Population | Missouri | U.S. |
| Under 5 years | 14,971 | 6.84%, see rank | 6.52% | 6.54% |
| 5 to 9 years | 15,086 | 6.90%, see rank | 6.52% | 6.59% |
| 10 to 14 years | 15,450 | 7.06%, see rank | 6.63% | 6.70% |
| 15 to 19 years | 15,192 | 6.95%, see rank | 7.08% | 7.14% |
| 20 to 24 years | 12,457 | 5.70%, see rank | 6.90% | 6.99% |
| 25 to 34 years | 28,401 | 12.98%, see rank | 12.95% | 13.30% |
| 35 to 44 years | 30,169 | 13.79%, see rank | 12.50% | 13.30% |
| 45 to 54 years | 36,012 | 16.46%, see rank | 14.84% | 14.58% |
| 55 to 64 years | 26,601 | 12.16%, see rank | 12.08% | 11.82% |
| 65 to 74 years | 14,827 | 6.78%, see rank | 7.52% | 7.03% |
| 75 to 84 | 7,230 | 3.31%, see rank | 4.58% | 4.23% |
| 85 years and over | 2,337 | 1.07%, see rank | 1.90% | 1.78% |
ACS 2008-2012 data
Total population: 218,628
Median Age (
see rank)
| Jefferson County | 37.70 years old |
| Missouri | 37.90 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Jefferson County | 37.00 years old |
| Missouri | 36.50 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Jefferson County | 38.30 years old |
| Missouri | 39.20 years old |
| U.S. | 38.50 years old |
| | Jefferson County | % of the Total Population | Missouri | U.S. |
| Under 5 years | 14,779 | 6.76%, see rank | 6.44% | 6.51% |
| 5 to 9 years | 14,929 | 6.83%, see rank | 6.51% | 6.57% |
| 10 to 14 years | 15,570 | 7.12%, see rank | 6.63% | 6.68% |
| 15 to 19 years | 14,974 | 6.85%, see rank | 7.04% | 7.09% |
| 20 to 24 years | 12,800 | 5.85%, see rank | 6.95% | 7.04% |
| 25 to 34 years | 28,479 | 13.03%, see rank | 12.96% | 13.32% |
| 35 to 44 years | 30,147 | 13.79%, see rank | 12.57% | 13.34% |
| 45 to 54 years | 35,598 | 16.28%, see rank | 14.66% | 14.44% |
| 55 to 64 years | 26,592 | 12.16%, see rank | 12.13% | 11.84% |
| 65 to 74 years | 15,175 | 6.94%, see rank | 7.60% | 7.12% |
| 75 to 84 | 7,400 | 3.38%, see rank | 4.57% | 4.25% |
| 85 years and over | 2,185 | 1.00%, see rank | 1.93% | 1.78% |
ACS 2006-2010 data
Total population: 216,262
Median Age (
see rank)
| Jefferson County | 37.10 years old |
| Missouri | 37.60 years old |
| U.S. | 36.90 years old |
Median Age, Male (
see rank)
| Jefferson County | 36.30 years old |
| Missouri | 36.20 years old |
| U.S. | 35.60 years old |
Median Age, Female (
see rank)
| Jefferson County | 37.70 years old |
| Missouri | 38.90 years old |
| U.S. | 38.10 years old |
| | Jefferson County | % of the Total Population | Missouri | U.S. |
| Under 5 years | 14,728 | 6.81%, see rank | 6.53% | 6.62% |
| 5 to 9 years | 15,094 | 6.98%, see rank | 6.51% | 6.62% |
| 10 to 14 years | 15,667 | 7.24%, see rank | 6.77% | 6.79% |
| 15 to 19 years | 15,557 | 7.19%, see rank | 7.26% | 7.28% |
| 20 to 24 years | 12,524 | 5.79%, see rank | 6.96% | 6.98% |
| 25 to 34 years | 28,146 | 13.01%, see rank | 12.74% | 13.22% |
| 35 to 44 years | 31,648 | 14.63%, see rank | 13.15% | 13.89% |
| 45 to 54 years | 35,309 | 16.33%, see rank | 14.84% | 14.57% |
| 55 to 64 years | 24,768 | 11.45%, see rank | 11.52% | 11.28% |
| 65 to 74 years | 13,741 | 6.35%, see rank | 7.25% | 6.74% |
| 75 to 84 | 7,087 | 3.28%, see rank | 4.61% | 4.30% |
| 85 years and over | 1,993 | 0.92%, see rank | 1.87% | 1.70% |
ACS 2005-2009 data
Total population: 215,386
Median Age (
see rank)
| Jefferson County | 36.90 years old |
| Missouri | 37.30 years old |
| U.S. | 36.50 years old |
Median Age, Male (
see rank)
| Jefferson County | 36.10 years old |
| Missouri | 35.90 years old |
| U.S. | 35.20 years old |
Median Age, Female (
see rank)
| Jefferson County | 37.60 years old |
| Missouri | 38.70 years old |
| U.S. | 37.90 years old |
| | Jefferson County | % of the Total Population | Missouri | U.S. |
| Under 5 years | 14,641 | 6.80%, see rank | 6.70% | 6.92% |
| 5 to 9 years | 14,436 | 6.70%, see rank | 6.45% | 6.59% |
| 10 to 14 years | 15,449 | 7.17%, see rank | 6.78% | 6.83% |
| 15 to 19 years | 14,900 | 6.92%, see rank | 7.16% | 7.15% |
| 20 to 24 years | 12,862 | 5.97%, see rank | 7.13% | 7.02% |
| 25 to 34 years | 29,458 | 13.68%, see rank | 12.83% | 13.42% |
| 35 to 44 years | 32,760 | 15.21%, see rank | 13.57% | 14.18% |
| 45 to 54 years | 34,917 | 16.21%, see rank | 14.77% | 14.48% |
| 55 to 64 years | 23,542 | 10.93%, see rank | 11.12% | 10.81% |
| 65 to 74 years | 13,147 | 6.10%, see rank | 6.95% | 6.50% |
| 75 to 84 | 7,168 | 3.33%, see rank | 4.67% | 4.40% |
| 85 years and over | 2,106 | 0.98%, see rank | 1.88% | 1.71% |
US Census 2000 data
Total population: 198,099
Median Age (
see rank)
| Jefferson County | 34.90 years old |
| Missouri | 36.10 years old |
| U.S. | 35.30 years old |
Median Age, Male (
see rank)
| Jefferson County | 34.20 years old |
| Missouri | 34.80 years old |
| U.S. | 34.00 years old |
Median Age, Female (
see rank)
| Jefferson County | 35.50 years old |
| Missouri | 37.40 years old |
| U.S. | 36.50 years old |
| | Jefferson County | % of the Total Population | Missouri | U.S. |
| Under 5 years | 14,257 | 7.20%, see rank | 6.61% | 6.81% |
| 5 to 9 years | 15,327 | 7.74%, see rank | 7.13% | 7.30% |
| 10 to 14 years | 16,110 | 8.13%, see rank | 7.36% | 7.29% |
| 15 to 19 years | 15,150 | 7.65%, see rank | 7.39% | 7.18% |
| 20 to 24 years | 11,362 | 5.74%, see rank | 6.60% | 6.74% |
| 25 to 34 years | 27,258 | 13.76%, see rank | 13.20% | 14.18% |
| 35 to 44 years | 35,817 | 18.08%, see rank | 15.86% | 16.04% |
| 45 to 54 years | 27,317 | 13.79%, see rank | 13.27% | 13.39% |
| 55 to 64 years | 17,302 | 8.73%, see rank | 9.07% | 8.63% |
| 65 to 74 years | 10,606 | 5.35%, see rank | 7.03% | 6.54% |
| 75 to 84 | 5,823 | 2.94%, see rank | 4.71% | 4.39% |
| 85 years and over | 1,770 | 0.89%, see rank | 1.76% | 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.
