Lake County Historical Age Data
ACS 2010-2014 data
Total population: 703,170
Median Age (
see rank)
| Lake County | 37.20 years old |
| Illinois | 37.00 years old |
| U.S. | 37.40 years old |
Median Age, Male (
see rank)
| Lake County | 35.60 years old |
| Illinois | 35.70 years old |
| U.S. | 36.10 years old |
Median Age, Female (
see rank)
| Lake County | 38.80 years old |
| Illinois | 38.40 years old |
| U.S. | 38.80 years old |
| | Lake County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 44,011 | 6.26%, see rank | 6.30% | 6.36% |
| 5 to 9 years | 51,464 | 7.32%, see rank | 6.58% | 6.51% |
| 10 to 14 years | 55,254 | 7.86%, see rank | 6.71% | 6.59% |
| 15 to 19 years | 56,909 | 8.09%, see rank | 6.94% | 6.85% |
| 20 to 24 years | 44,661 | 6.35%, see rank | 6.95% | 7.13% |
| 25 to 34 years | 79,091 | 11.25%, see rank | 13.84% | 13.47% |
| 35 to 44 years | 94,991 | 13.51%, see rank | 13.20% | 12.96% |
| 45 to 54 years | 111,466 | 15.85%, see rank | 14.17% | 14.09% |
| 55 to 64 years | 85,924 | 12.22%, see rank | 12.13% | 12.29% |
| 65 to 74 years | 45,192 | 6.43%, see rank | 7.18% | 7.64% |
| 75 to 84 | 23,259 | 3.31%, see rank | 4.10% | 4.25% |
| 85 years and over | 10,948 | 1.56%, see rank | 1.90% | 1.85% |
US Census 2010 data
Total population: 703,462
Median Age (
see rank)
| Lake County | 36.70 years old |
| Illinois | 36.60 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Lake County | 35.10 years old |
| Illinois | 35.20 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Lake County | 38.10 years old |
| Illinois | 37.90 years old |
| U.S. | 38.50 years old |
| | Lake County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 47,115 | 6.70%, see rank | 6.51% | 6.54% |
| 5 to 9 years | 53,615 | 7.62%, see rank | 6.70% | 6.59% |
| 10 to 14 years | 56,719 | 8.06%, see rank | 6.85% | 6.70% |
| 15 to 19 years | 56,143 | 7.98%, see rank | 7.19% | 7.14% |
| 20 to 24 years | 42,235 | 6.00%, see rank | 6.85% | 6.99% |
| 25 to 34 years | 81,060 | 11.52%, see rank | 13.84% | 13.30% |
| 35 to 44 years | 99,747 | 14.18%, see rank | 13.45% | 13.30% |
| 45 to 54 years | 113,983 | 16.20%, see rank | 14.58% | 14.58% |
| 55 to 64 years | 79,752 | 11.34%, see rank | 11.48% | 11.82% |
| 65 to 74 years | 40,436 | 5.75%, see rank | 6.62% | 7.03% |
| 75 to 84 | 22,762 | 3.24%, see rank | 4.09% | 4.23% |
| 85 years and over | 9,895 | 1.41%, see rank | 1.83% | 1.78% |
ACS 2008-2012 data
Total population: 701,282
Median Age (
see rank)
| Lake County | 36.70 years old |
| Illinois | 36.60 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Lake County | 35.20 years old |
| Illinois | 35.30 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Lake County | 38.20 years old |
| Illinois | 38.00 years old |
| U.S. | 38.50 years old |
| | Lake County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 46,720 | 6.66%, see rank | 6.50% | 6.51% |
| 5 to 9 years | 53,850 | 7.68%, see rank | 6.68% | 6.57% |
| 10 to 14 years | 55,483 | 7.91%, see rank | 6.82% | 6.68% |
| 15 to 19 years | 56,457 | 8.05%, see rank | 7.16% | 7.09% |
| 20 to 24 years | 41,935 | 5.98%, see rank | 6.88% | 7.04% |
| 25 to 34 years | 80,398 | 11.46%, see rank | 13.84% | 13.32% |
| 35 to 44 years | 99,856 | 14.24%, see rank | 13.49% | 13.34% |
| 45 to 54 years | 112,889 | 16.10%, see rank | 14.46% | 14.44% |
| 55 to 64 years | 79,940 | 11.40%, see rank | 11.52% | 11.84% |
| 65 to 74 years | 40,887 | 5.83%, see rank | 6.71% | 7.12% |
| 75 to 84 | 22,897 | 3.27%, see rank | 4.11% | 4.25% |
| 85 years and over | 9,970 | 1.42%, see rank | 1.83% | 1.78% |
ACS 2006-2010 data
Total population: 697,179
Median Age (
see rank)
| Lake County | 36.10 years old |
| Illinois | 36.20 years old |
| U.S. | 36.90 years old |
Median Age, Male (
see rank)
| Lake County | 34.70 years old |
| Illinois | 34.90 years old |
| U.S. | 35.60 years old |
Median Age, Female (
see rank)
| Lake County | 37.40 years old |
| Illinois | 37.60 years old |
| U.S. | 38.10 years old |
| | Lake County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 48,918 | 7.02%, see rank | 6.63% | 6.62% |
| 5 to 9 years | 55,113 | 7.91%, see rank | 6.78% | 6.62% |
| 10 to 14 years | 55,619 | 7.98%, see rank | 6.94% | 6.79% |
| 15 to 19 years | 55,724 | 7.99%, see rank | 7.31% | 7.28% |
| 20 to 24 years | 41,508 | 5.95%, see rank | 6.86% | 6.98% |
| 25 to 34 years | 80,992 | 11.62%, see rank | 13.78% | 13.22% |
| 35 to 44 years | 105,175 | 15.09%, see rank | 13.96% | 13.89% |
| 45 to 54 years | 111,386 | 15.98%, see rank | 14.55% | 14.57% |
| 55 to 64 years | 73,796 | 10.58%, see rank | 10.89% | 11.28% |
| 65 to 74 years | 37,183 | 5.33%, see rank | 6.36% | 6.74% |
| 75 to 84 | 23,260 | 3.34%, see rank | 4.17% | 4.30% |
| 85 years and over | 8,505 | 1.22%, see rank | 1.77% | 1.70% |
ACS 2005-2009 data
Total population: 702,558
Median Age (
see rank)
| Lake County | 35.90 years old |
| Illinois | 35.90 years old |
| U.S. | 36.50 years old |
Median Age, Male (
see rank)
| Lake County | 34.80 years old |
| Illinois | 34.60 years old |
| U.S. | 35.20 years old |
Median Age, Female (
see rank)
| Lake County | 36.90 years old |
| Illinois | 37.20 years old |
| U.S. | 37.90 years old |
| | Lake County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 51,767 | 7.37%, see rank | 6.97% | 6.92% |
| 5 to 9 years | 55,813 | 7.94%, see rank | 6.76% | 6.59% |
| 10 to 14 years | 56,276 | 8.01%, see rank | 6.96% | 6.83% |
| 15 to 19 years | 56,560 | 8.05%, see rank | 7.24% | 7.15% |
| 20 to 24 years | 45,566 | 6.49%, see rank | 7.08% | 7.02% |
| 25 to 34 years | 76,153 | 10.84%, see rank | 13.73% | 13.42% |
| 35 to 44 years | 109,852 | 15.64%, see rank | 14.23% | 14.18% |
| 45 to 54 years | 111,473 | 15.87%, see rank | 14.47% | 14.48% |
| 55 to 64 years | 71,728 | 10.21%, see rank | 10.43% | 10.81% |
| 65 to 74 years | 36,629 | 5.21%, see rank | 6.21% | 6.50% |
| 75 to 84 | 22,741 | 3.24%, see rank | 4.17% | 4.40% |
| 85 years and over | 8,000 | 1.14%, see rank | 1.74% | 1.71% |
US Census 2000 data
Total population: 644,356
Median Age (
see rank)
| Lake County | 33.80 years old |
| Illinois | 34.70 years old |
| U.S. | 35.30 years old |
Median Age, Male (
see rank)
| Lake County | 32.50 years old |
| Illinois | 33.30 years old |
| U.S. | 34.00 years old |
Median Age, Female (
see rank)
| Lake County | 34.90 years old |
| Illinois | 36.00 years old |
| U.S. | 36.50 years old |
| | Lake County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 52,978 | 8.22%, see rank | 7.06% | 6.81% |
| 5 to 9 years | 55,785 | 8.66%, see rank | 7.49% | 7.30% |
| 10 to 14 years | 51,861 | 8.05%, see rank | 7.29% | 7.29% |
| 15 to 19 years | 48,500 | 7.53%, see rank | 7.20% | 7.18% |
| 20 to 24 years | 37,733 | 5.86%, see rank | 6.85% | 6.74% |
| 25 to 34 years | 87,983 | 13.65%, see rank | 14.59% | 14.18% |
| 35 to 44 years | 115,530 | 17.93%, see rank | 15.97% | 16.04% |
| 45 to 54 years | 89,642 | 13.91%, see rank | 13.10% | 13.39% |
| 55 to 64 years | 49,355 | 7.66%, see rank | 8.38% | 8.63% |
| 65 to 74 years | 30,625 | 4.75%, see rank | 6.22% | 6.54% |
| 75 to 84 | 18,323 | 2.84%, see rank | 4.31% | 4.39% |
| 85 years and over | 6,041 | 0.94%, 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.
