Jefferson County Historical Age Data
ACS 2010-2014 data
Total population: 38,716
Median Age (
see rank)
Jefferson County | 40.90 years old |
Illinois | 37.00 years old |
U.S. | 37.40 years old |
Median Age, Male (
see rank)
Jefferson County | 39.20 years old |
Illinois | 35.70 years old |
U.S. | 36.10 years old |
Median Age, Female (
see rank)
Jefferson County | 43.10 years old |
Illinois | 38.40 years old |
U.S. | 38.80 years old |
| Jefferson County | % of the Total Population | Illinois | U.S. |
Under 5 years | 2,428 | 6.27%, see rank | 6.30% | 6.36% |
5 to 9 years | 2,287 | 5.91%, see rank | 6.58% | 6.51% |
10 to 14 years | 2,333 | 6.03%, see rank | 6.71% | 6.59% |
15 to 19 years | 2,346 | 6.06%, see rank | 6.94% | 6.85% |
20 to 24 years | 2,369 | 6.12%, see rank | 6.95% | 7.13% |
25 to 34 years | 4,825 | 12.46%, see rank | 13.84% | 13.47% |
35 to 44 years | 4,755 | 12.28%, see rank | 13.20% | 12.96% |
45 to 54 years | 5,624 | 14.53%, see rank | 14.17% | 14.09% |
55 to 64 years | 5,225 | 13.50%, see rank | 12.13% | 12.29% |
65 to 74 years | 3,518 | 9.09%, see rank | 7.18% | 7.64% |
75 to 84 | 2,120 | 5.48%, see rank | 4.10% | 4.25% |
85 years and over | 886 | 2.29%, see rank | 1.90% | 1.85% |
US Census 2010 data
Total population: 38,827
Median Age (
see rank)
Jefferson County | 40.60 years old |
Illinois | 36.60 years old |
U.S. | 37.20 years old |
Median Age, Male (
see rank)
Jefferson County | 39.00 years old |
Illinois | 35.20 years old |
U.S. | 35.80 years old |
Median Age, Female (
see rank)
Jefferson County | 42.30 years old |
Illinois | 37.90 years old |
U.S. | 38.50 years old |
| Jefferson County | % of the Total Population | Illinois | U.S. |
Under 5 years | 2,434 | 6.27%, see rank | 6.51% | 6.54% |
5 to 9 years | 2,305 | 5.94%, see rank | 6.70% | 6.59% |
10 to 14 years | 2,369 | 6.10%, see rank | 6.85% | 6.70% |
15 to 19 years | 2,551 | 6.57%, see rank | 7.19% | 7.14% |
20 to 24 years | 2,248 | 5.79%, see rank | 6.85% | 6.99% |
25 to 34 years | 4,794 | 12.35%, see rank | 13.84% | 13.30% |
35 to 44 years | 4,977 | 12.82%, see rank | 13.45% | 13.30% |
45 to 54 years | 5,654 | 14.56%, see rank | 14.58% | 14.58% |
55 to 64 years | 5,207 | 13.41%, see rank | 11.48% | 11.82% |
65 to 74 years | 3,356 | 8.64%, see rank | 6.62% | 7.03% |
75 to 84 | 1,940 | 5.00%, see rank | 4.09% | 4.23% |
85 years and over | 992 | 2.55%, see rank | 1.83% | 1.78% |
ACS 2008-2012 data
Total population: 38,908
Median Age (
see rank)
Jefferson County | 40.50 years old |
Illinois | 36.60 years old |
U.S. | 37.20 years old |
Median Age, Male (
see rank)
Jefferson County | 38.90 years old |
Illinois | 35.30 years old |
U.S. | 35.80 years old |
Median Age, Female (
see rank)
Jefferson County | 42.50 years old |
Illinois | 38.00 years old |
U.S. | 38.50 years old |
| Jefferson County | % of the Total Population | Illinois | U.S. |
Under 5 years | 2,391 | 6.15%, see rank | 6.50% | 6.51% |
5 to 9 years | 2,391 | 6.15%, see rank | 6.68% | 6.57% |
10 to 14 years | 2,328 | 5.98%, see rank | 6.82% | 6.68% |
15 to 19 years | 2,533 | 6.51%, see rank | 7.16% | 7.09% |
20 to 24 years | 2,278 | 5.85%, see rank | 6.88% | 7.04% |
25 to 34 years | 4,701 | 12.08%, see rank | 13.84% | 13.32% |
35 to 44 years | 5,012 | 12.88%, see rank | 13.49% | 13.34% |
45 to 54 years | 5,763 | 14.81%, see rank | 14.46% | 14.44% |
55 to 64 years | 5,150 | 13.24%, see rank | 11.52% | 11.84% |
65 to 74 years | 3,368 | 8.66%, see rank | 6.71% | 7.12% |
75 to 84 | 1,940 | 4.99%, see rank | 4.11% | 4.25% |
85 years and over | 1,053 | 2.71%, see rank | 1.83% | 1.78% |
ACS 2006-2010 data
Total population: 39,202
Median Age (
see rank)
Jefferson County | 40.30 years old |
Illinois | 36.20 years old |
U.S. | 36.90 years old |
Median Age, Male (
see rank)
Jefferson County | 38.70 years old |
Illinois | 34.90 years old |
U.S. | 35.60 years old |
Median Age, Female (
see rank)
Jefferson County | 42.10 years old |
Illinois | 37.60 years old |
U.S. | 38.10 years old |
| Jefferson County | % of the Total Population | Illinois | U.S. |
Under 5 years | 2,422 | 6.18%, see rank | 6.63% | 6.62% |
5 to 9 years | 2,366 | 6.04%, see rank | 6.78% | 6.62% |
10 to 14 years | 2,444 | 6.23%, see rank | 6.94% | 6.79% |
15 to 19 years | 2,705 | 6.90%, see rank | 7.31% | 7.28% |
20 to 24 years | 2,290 | 5.84%, see rank | 6.86% | 6.98% |
25 to 34 years | 4,711 | 12.02%, see rank | 13.78% | 13.22% |
35 to 44 years | 5,202 | 13.27%, see rank | 13.96% | 13.89% |
45 to 54 years | 5,915 | 15.09%, see rank | 14.55% | 14.57% |
55 to 64 years | 4,959 | 12.65%, see rank | 10.89% | 11.28% |
65 to 74 years | 3,250 | 8.29%, see rank | 6.36% | 6.74% |
75 to 84 | 1,990 | 5.08%, see rank | 4.17% | 4.30% |
85 years and over | 948 | 2.42%, see rank | 1.77% | 1.70% |
ACS 2005-2009 data
Total population: 40,063
Median Age (
see rank)
Jefferson County | 40.10 years old |
Illinois | 35.90 years old |
U.S. | 36.50 years old |
Median Age, Male (
see rank)
Jefferson County | 38.20 years old |
Illinois | 34.60 years old |
U.S. | 35.20 years old |
Median Age, Female (
see rank)
Jefferson County | 42.20 years old |
Illinois | 37.20 years old |
U.S. | 37.90 years old |
| Jefferson County | % of the Total Population | Illinois | U.S. |
Under 5 years | 2,351 | 5.87%, see rank | 6.97% | 6.92% |
5 to 9 years | 2,267 | 5.66%, see rank | 6.76% | 6.59% |
10 to 14 years | 2,572 | 6.42%, see rank | 6.96% | 6.83% |
15 to 19 years | 2,671 | 6.67%, see rank | 7.24% | 7.15% |
20 to 24 years | 2,576 | 6.43%, see rank | 7.08% | 7.02% |
25 to 34 years | 5,048 | 12.60%, see rank | 13.73% | 13.42% |
35 to 44 years | 5,424 | 13.54%, see rank | 14.23% | 14.18% |
45 to 54 years | 6,032 | 15.06%, see rank | 14.47% | 14.48% |
55 to 64 years | 4,836 | 12.07%, see rank | 10.43% | 10.81% |
65 to 74 years | 3,193 | 7.97%, see rank | 6.21% | 6.50% |
75 to 84 | 2,050 | 5.12%, see rank | 4.17% | 4.40% |
85 years and over | 1,043 | 2.60%, see rank | 1.74% | 1.71% |
US Census 2000 data
Total population: 40,045
Median Age (
see rank)
Jefferson County | 37.60 years old |
Illinois | 34.70 years old |
U.S. | 35.30 years old |
Median Age, Male (
see rank)
Jefferson County | 35.90 years old |
Illinois | 33.30 years old |
U.S. | 34.00 years old |
Median Age, Female (
see rank)
Jefferson County | 39.60 years old |
Illinois | 36.00 years old |
U.S. | 36.50 years old |
| Jefferson County | % of the Total Population | Illinois | U.S. |
Under 5 years | 2,344 | 5.85%, see rank | 7.06% | 6.81% |
5 to 9 years | 2,718 | 6.79%, see rank | 7.49% | 7.30% |
10 to 14 years | 2,945 | 7.35%, see rank | 7.29% | 7.29% |
15 to 19 years | 2,788 | 6.96%, see rank | 7.20% | 7.18% |
20 to 24 years | 2,416 | 6.03%, see rank | 6.85% | 6.74% |
25 to 34 years | 5,245 | 13.10%, see rank | 14.59% | 14.18% |
35 to 44 years | 6,129 | 15.31%, see rank | 15.97% | 16.04% |
45 to 54 years | 5,523 | 13.79%, see rank | 13.10% | 13.39% |
55 to 64 years | 3,807 | 9.51%, see rank | 8.38% | 8.63% |
65 to 74 years | 2,951 | 7.37%, see rank | 6.22% | 6.54% |
75 to 84 | 2,341 | 5.85%, see rank | 4.31% | 4.39% |
85 years and over | 838 | 2.09%, 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.