Lee County Historical Age Data
ACS 2010-2014 data
Total population: 35,248
Median Age (
see rank)
| Lee County | 41.80 years old |
| Illinois | 37.00 years old |
| U.S. | 37.40 years old |
Median Age, Male (
see rank)
| Lee County | 40.70 years old |
| Illinois | 35.70 years old |
| U.S. | 36.10 years old |
Median Age, Female (
see rank)
| Lee County | 43.50 years old |
| Illinois | 38.40 years old |
| U.S. | 38.80 years old |
| | Lee County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 1,934 | 5.49%, see rank | 6.30% | 6.36% |
| 5 to 9 years | 2,010 | 5.70%, see rank | 6.58% | 6.51% |
| 10 to 14 years | 2,071 | 5.88%, see rank | 6.71% | 6.59% |
| 15 to 19 years | 2,218 | 6.29%, see rank | 6.94% | 6.85% |
| 20 to 24 years | 2,055 | 5.83%, see rank | 6.95% | 7.13% |
| 25 to 34 years | 4,278 | 12.14%, see rank | 13.84% | 13.47% |
| 35 to 44 years | 4,363 | 12.38%, see rank | 13.20% | 12.96% |
| 45 to 54 years | 5,540 | 15.72%, see rank | 14.17% | 14.09% |
| 55 to 64 years | 4,942 | 14.02%, see rank | 12.13% | 12.29% |
| 65 to 74 years | 3,074 | 8.72%, see rank | 7.18% | 7.64% |
| 75 to 84 | 1,923 | 5.46%, see rank | 4.10% | 4.25% |
| 85 years and over | 840 | 2.38%, see rank | 1.90% | 1.85% |
US Census 2010 data
Total population: 36,031
Median Age (
see rank)
| Lee County | 42.00 years old |
| Illinois | 36.60 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Lee County | 40.90 years old |
| Illinois | 35.20 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Lee County | 43.30 years old |
| Illinois | 37.90 years old |
| U.S. | 38.50 years old |
| | Lee County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 2,048 | 5.68%, see rank | 6.51% | 6.54% |
| 5 to 9 years | 2,062 | 5.72%, see rank | 6.70% | 6.59% |
| 10 to 14 years | 2,126 | 5.90%, see rank | 6.85% | 6.70% |
| 15 to 19 years | 2,414 | 6.70%, see rank | 7.19% | 7.14% |
| 20 to 24 years | 2,000 | 5.55%, see rank | 6.85% | 6.99% |
| 25 to 34 years | 4,232 | 11.75%, see rank | 13.84% | 13.30% |
| 35 to 44 years | 4,696 | 13.03%, see rank | 13.45% | 13.30% |
| 45 to 54 years | 5,985 | 16.61%, see rank | 14.58% | 14.58% |
| 55 to 64 years | 4,824 | 13.39%, see rank | 11.48% | 11.82% |
| 65 to 74 years | 2,932 | 8.14%, see rank | 6.62% | 7.03% |
| 75 to 84 | 1,889 | 5.24%, see rank | 4.09% | 4.23% |
| 85 years and over | 823 | 2.28%, see rank | 1.83% | 1.78% |
ACS 2008-2012 data
Total population: 35,778
Median Age (
see rank)
| Lee County | 41.60 years old |
| Illinois | 36.60 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Lee County | 40.00 years old |
| Illinois | 35.30 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Lee County | 42.90 years old |
| Illinois | 38.00 years old |
| U.S. | 38.50 years old |
| | Lee County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 2,010 | 5.62%, see rank | 6.50% | 6.51% |
| 5 to 9 years | 2,088 | 5.84%, see rank | 6.68% | 6.57% |
| 10 to 14 years | 2,138 | 5.98%, see rank | 6.82% | 6.68% |
| 15 to 19 years | 2,410 | 6.74%, see rank | 7.16% | 7.09% |
| 20 to 24 years | 2,254 | 6.30%, see rank | 6.88% | 7.04% |
| 25 to 34 years | 4,036 | 11.28%, see rank | 13.84% | 13.32% |
| 35 to 44 years | 4,686 | 13.10%, see rank | 13.49% | 13.34% |
| 45 to 54 years | 5,827 | 16.29%, see rank | 14.46% | 14.44% |
| 55 to 64 years | 4,657 | 13.02%, see rank | 11.52% | 11.84% |
| 65 to 74 years | 2,949 | 8.24%, see rank | 6.71% | 7.12% |
| 75 to 84 | 1,822 | 5.09%, see rank | 4.11% | 4.25% |
| 85 years and over | 901 | 2.52%, see rank | 1.83% | 1.78% |
ACS 2006-2010 data
Total population: 36,100
Median Age (
see rank)
| Lee County | 40.80 years old |
| Illinois | 36.20 years old |
| U.S. | 36.90 years old |
Median Age, Male (
see rank)
| Lee County | 39.00 years old |
| Illinois | 34.90 years old |
| U.S. | 35.60 years old |
Median Age, Female (
see rank)
| Lee County | 41.90 years old |
| Illinois | 37.60 years old |
| U.S. | 38.10 years old |
| | Lee County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 2,026 | 5.61%, see rank | 6.63% | 6.62% |
| 5 to 9 years | 2,152 | 5.96%, see rank | 6.78% | 6.62% |
| 10 to 14 years | 2,284 | 6.33%, see rank | 6.94% | 6.79% |
| 15 to 19 years | 2,559 | 7.09%, see rank | 7.31% | 7.28% |
| 20 to 24 years | 2,271 | 6.29%, see rank | 6.86% | 6.98% |
| 25 to 34 years | 3,993 | 11.06%, see rank | 13.78% | 13.22% |
| 35 to 44 years | 5,012 | 13.88%, see rank | 13.96% | 13.89% |
| 45 to 54 years | 5,854 | 16.22%, see rank | 14.55% | 14.57% |
| 55 to 64 years | 4,385 | 12.15%, see rank | 10.89% | 11.28% |
| 65 to 74 years | 2,906 | 8.05%, see rank | 6.36% | 6.74% |
| 75 to 84 | 1,727 | 4.78%, see rank | 4.17% | 4.30% |
| 85 years and over | 931 | 2.58%, see rank | 1.77% | 1.70% |
ACS 2005-2009 data
Total population: 34,994
Median Age (
see rank)
| Lee County | 40.90 years old |
| Illinois | 35.90 years old |
| U.S. | 36.50 years old |
Median Age, Male (
see rank)
| Lee County | 38.90 years old |
| Illinois | 34.60 years old |
| U.S. | 35.20 years old |
Median Age, Female (
see rank)
| Lee County | 42.50 years old |
| Illinois | 37.20 years old |
| U.S. | 37.90 years old |
| | Lee County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 1,936 | 5.53%, see rank | 6.97% | 6.92% |
| 5 to 9 years | 2,034 | 5.81%, see rank | 6.76% | 6.59% |
| 10 to 14 years | 2,324 | 6.64%, see rank | 6.96% | 6.83% |
| 15 to 19 years | 2,475 | 7.07%, see rank | 7.24% | 7.15% |
| 20 to 24 years | 2,148 | 6.14%, see rank | 7.08% | 7.02% |
| 25 to 34 years | 3,684 | 10.53%, see rank | 13.73% | 13.42% |
| 35 to 44 years | 5,194 | 14.84%, see rank | 14.23% | 14.18% |
| 45 to 54 years | 5,690 | 16.26%, see rank | 14.47% | 14.48% |
| 55 to 64 years | 4,141 | 11.83%, see rank | 10.43% | 10.81% |
| 65 to 74 years | 2,755 | 7.87%, see rank | 6.21% | 6.50% |
| 75 to 84 | 1,657 | 4.74%, see rank | 4.17% | 4.40% |
| 85 years and over | 956 | 2.73%, see rank | 1.74% | 1.71% |
US Census 2000 data
Total population: 36,062
Median Age (
see rank)
| Lee County | 37.90 years old |
| Illinois | 34.70 years old |
| U.S. | 35.30 years old |
Median Age, Male (
see rank)
| Lee County | 37.00 years old |
| Illinois | 33.30 years old |
| U.S. | 34.00 years old |
Median Age, Female (
see rank)
| Lee County | 39.10 years old |
| Illinois | 36.00 years old |
| U.S. | 36.50 years old |
| | Lee County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 1,992 | 5.52%, see rank | 7.06% | 6.81% |
| 5 to 9 years | 2,416 | 6.70%, see rank | 7.49% | 7.30% |
| 10 to 14 years | 2,746 | 7.61%, see rank | 7.29% | 7.29% |
| 15 to 19 years | 2,507 | 6.95%, see rank | 7.20% | 7.18% |
| 20 to 24 years | 1,884 | 5.22%, see rank | 6.85% | 6.74% |
| 25 to 34 years | 4,637 | 12.86%, see rank | 14.59% | 14.18% |
| 35 to 44 years | 6,277 | 17.41%, see rank | 15.97% | 16.04% |
| 45 to 54 years | 5,056 | 14.02%, see rank | 13.10% | 13.39% |
| 55 to 64 years | 3,259 | 9.04%, see rank | 8.38% | 8.63% |
| 65 to 74 years | 2,699 | 7.48%, see rank | 6.22% | 6.54% |
| 75 to 84 | 1,861 | 5.16%, see rank | 4.31% | 4.39% |
| 85 years and over | 728 | 2.02%, 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.
