Dekalb County Historical Age Data
ACS 2010-2014 data
Total population: 104,919
Median Age (
see rank)
| Dekalb County | 29.80 years old |
| Illinois | 37.00 years old |
| U.S. | 37.40 years old |
Median Age, Male (
see rank)
| Dekalb County | 29.30 years old |
| Illinois | 35.70 years old |
| U.S. | 36.10 years old |
Median Age, Female (
see rank)
| Dekalb County | 30.60 years old |
| Illinois | 38.40 years old |
| U.S. | 38.80 years old |
| | Dekalb County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 6,266 | 5.97%, see rank | 6.30% | 6.36% |
| 5 to 9 years | 6,027 | 5.74%, see rank | 6.58% | 6.51% |
| 10 to 14 years | 6,898 | 6.57%, see rank | 6.71% | 6.59% |
| 15 to 19 years | 10,242 | 9.76%, see rank | 6.94% | 6.85% |
| 20 to 24 years | 15,574 | 14.84%, see rank | 6.95% | 7.13% |
| 25 to 34 years | 14,278 | 13.61%, see rank | 13.84% | 13.47% |
| 35 to 44 years | 11,626 | 11.08%, see rank | 13.20% | 12.96% |
| 45 to 54 years | 12,687 | 12.09%, see rank | 14.17% | 14.09% |
| 55 to 64 years | 10,408 | 9.92%, see rank | 12.13% | 12.29% |
| 65 to 74 years | 5,910 | 5.63%, see rank | 7.18% | 7.64% |
| 75 to 84 | 3,248 | 3.10%, see rank | 4.10% | 4.25% |
| 85 years and over | 1,755 | 1.67%, see rank | 1.90% | 1.85% |
US Census 2010 data
Total population: 105,160
Median Age (
see rank)
| Dekalb County | 29.30 years old |
| Illinois | 36.60 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Dekalb County | 28.50 years old |
| Illinois | 35.20 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Dekalb County | 30.30 years old |
| Illinois | 37.90 years old |
| U.S. | 38.50 years old |
| | Dekalb County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 6,645 | 6.32%, see rank | 6.51% | 6.54% |
| 5 to 9 years | 6,655 | 6.33%, see rank | 6.70% | 6.59% |
| 10 to 14 years | 6,351 | 6.04%, see rank | 6.85% | 6.70% |
| 15 to 19 years | 9,755 | 9.28%, see rank | 7.19% | 7.14% |
| 20 to 24 years | 15,901 | 15.12%, see rank | 6.85% | 6.99% |
| 25 to 34 years | 14,767 | 14.04%, see rank | 13.84% | 13.30% |
| 35 to 44 years | 11,956 | 11.37%, see rank | 13.45% | 13.30% |
| 45 to 54 years | 13,051 | 12.41%, see rank | 14.58% | 14.58% |
| 55 to 64 years | 9,742 | 9.26%, see rank | 11.48% | 11.82% |
| 65 to 74 years | 5,395 | 5.13%, see rank | 6.62% | 7.03% |
| 75 to 84 | 3,366 | 3.20%, see rank | 4.09% | 4.23% |
| 85 years and over | 1,576 | 1.50%, see rank | 1.83% | 1.78% |
ACS 2008-2012 data
Total population: 104,820
Median Age (
see rank)
| Dekalb County | 29.40 years old |
| Illinois | 36.60 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Dekalb County | 28.50 years old |
| Illinois | 35.30 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Dekalb County | 30.30 years old |
| Illinois | 38.00 years old |
| U.S. | 38.50 years old |
| | Dekalb County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 6,495 | 6.20%, see rank | 6.50% | 6.51% |
| 5 to 9 years | 6,286 | 6.00%, see rank | 6.68% | 6.57% |
| 10 to 14 years | 6,602 | 6.30%, see rank | 6.82% | 6.68% |
| 15 to 19 years | 9,953 | 9.50%, see rank | 7.16% | 7.09% |
| 20 to 24 years | 16,007 | 15.27%, see rank | 6.88% | 7.04% |
| 25 to 34 years | 14,533 | 13.86%, see rank | 13.84% | 13.32% |
| 35 to 44 years | 12,028 | 11.47%, see rank | 13.49% | 13.34% |
| 45 to 54 years | 12,782 | 12.19%, see rank | 14.46% | 14.44% |
| 55 to 64 years | 9,825 | 9.37%, see rank | 11.52% | 11.84% |
| 65 to 74 years | 5,474 | 5.22%, see rank | 6.71% | 7.12% |
| 75 to 84 | 3,372 | 3.22%, see rank | 4.11% | 4.25% |
| 85 years and over | 1,463 | 1.40%, see rank | 1.83% | 1.78% |
ACS 2006-2010 data
Total population: 104,026
Median Age (
see rank)
| Dekalb County | 29.00 years old |
| Illinois | 36.20 years old |
| U.S. | 36.90 years old |
Median Age, Male (
see rank)
| Dekalb County | 28.00 years old |
| Illinois | 34.90 years old |
| U.S. | 35.60 years old |
Median Age, Female (
see rank)
| Dekalb County | 30.00 years old |
| Illinois | 37.60 years old |
| U.S. | 38.10 years old |
| | Dekalb County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 6,528 | 6.28%, see rank | 6.63% | 6.62% |
| 5 to 9 years | 6,588 | 6.33%, see rank | 6.78% | 6.62% |
| 10 to 14 years | 6,331 | 6.09%, see rank | 6.94% | 6.79% |
| 15 to 19 years | 10,652 | 10.24%, see rank | 7.31% | 7.28% |
| 20 to 24 years | 15,693 | 15.09%, see rank | 6.86% | 6.98% |
| 25 to 34 years | 14,088 | 13.54%, see rank | 13.78% | 13.22% |
| 35 to 44 years | 12,484 | 12.00%, see rank | 13.96% | 13.89% |
| 45 to 54 years | 12,680 | 12.19%, see rank | 14.55% | 14.57% |
| 55 to 64 years | 9,085 | 8.73%, see rank | 10.89% | 11.28% |
| 65 to 74 years | 5,120 | 4.92%, see rank | 6.36% | 6.74% |
| 75 to 84 | 3,228 | 3.10%, see rank | 4.17% | 4.30% |
| 85 years and over | 1,549 | 1.49%, see rank | 1.77% | 1.70% |
ACS 2005-2009 data
Total population: 104,279
Median Age (
see rank)
| Dekalb County | 27.20 years old |
| Illinois | 35.90 years old |
| U.S. | 36.50 years old |
Median Age, Male (
see rank)
| Dekalb County | 26.90 years old |
| Illinois | 34.60 years old |
| U.S. | 35.20 years old |
Median Age, Female (
see rank)
| Dekalb County | 27.50 years old |
| Illinois | 37.20 years old |
| U.S. | 37.90 years old |
| | Dekalb County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 6,452 | 6.19%, see rank | 6.97% | 6.92% |
| 5 to 9 years | 6,335 | 6.08%, see rank | 6.76% | 6.59% |
| 10 to 14 years | 6,331 | 6.07%, see rank | 6.96% | 6.83% |
| 15 to 19 years | 12,097 | 11.60%, see rank | 7.24% | 7.15% |
| 20 to 24 years | 17,991 | 17.25%, see rank | 7.08% | 7.02% |
| 25 to 34 years | 11,606 | 11.13%, see rank | 13.73% | 13.42% |
| 35 to 44 years | 12,881 | 12.35%, see rank | 14.23% | 14.18% |
| 45 to 54 years | 12,381 | 11.87%, see rank | 14.47% | 14.48% |
| 55 to 64 years | 8,456 | 8.11%, see rank | 10.43% | 10.81% |
| 65 to 74 years | 4,951 | 4.75%, see rank | 6.21% | 6.50% |
| 75 to 84 | 3,292 | 3.16%, see rank | 4.17% | 4.40% |
| 85 years and over | 1,506 | 1.44%, see rank | 1.74% | 1.71% |
US Census 2000 data
Total population: 88,969
Median Age (
see rank)
| Dekalb County | 28.40 years old |
| Illinois | 34.70 years old |
| U.S. | 35.30 years old |
Median Age, Male (
see rank)
| Dekalb County | 27.50 years old |
| Illinois | 33.30 years old |
| U.S. | 34.00 years old |
Median Age, Female (
see rank)
| Dekalb County | 29.20 years old |
| Illinois | 36.00 years old |
| U.S. | 36.50 years old |
| | Dekalb County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 5,551 | 6.24%, see rank | 7.06% | 6.81% |
| 5 to 9 years | 5,774 | 6.49%, see rank | 7.49% | 7.30% |
| 10 to 14 years | 5,878 | 6.61%, see rank | 7.29% | 7.29% |
| 15 to 19 years | 9,237 | 10.38%, see rank | 7.20% | 7.18% |
| 20 to 24 years | 13,743 | 15.45%, see rank | 6.85% | 6.74% |
| 25 to 34 years | 12,008 | 13.50%, see rank | 14.59% | 14.18% |
| 35 to 44 years | 12,558 | 14.12%, see rank | 15.97% | 16.04% |
| 45 to 54 years | 9,643 | 10.84%, see rank | 13.10% | 13.39% |
| 55 to 64 years | 5,866 | 6.59%, see rank | 8.38% | 8.63% |
| 65 to 74 years | 4,285 | 4.82%, see rank | 6.22% | 6.54% |
| 75 to 84 | 3,224 | 3.62%, see rank | 4.31% | 4.39% |
| 85 years and over | 1,202 | 1.35%, 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.
