Winnebago County Historical Age Data
ACS 2010-2014 data
Total population: 292,026
Median Age (
see rank)
| Winnebago County | 38.90 years old |
| Illinois | 37.00 years old |
| U.S. | 37.40 years old |
Median Age, Male (
see rank)
| Winnebago County | 37.90 years old |
| Illinois | 35.70 years old |
| U.S. | 36.10 years old |
Median Age, Female (
see rank)
| Winnebago County | 40.10 years old |
| Illinois | 38.40 years old |
| U.S. | 38.80 years old |
| | Winnebago County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 18,800 | 6.44%, see rank | 6.30% | 6.36% |
| 5 to 9 years | 20,001 | 6.85%, see rank | 6.58% | 6.51% |
| 10 to 14 years | 19,895 | 6.81%, see rank | 6.71% | 6.59% |
| 15 to 19 years | 19,442 | 6.66%, see rank | 6.94% | 6.85% |
| 20 to 24 years | 18,052 | 6.18%, see rank | 6.95% | 7.13% |
| 25 to 34 years | 36,065 | 12.35%, see rank | 13.84% | 13.47% |
| 35 to 44 years | 36,950 | 12.65%, see rank | 13.20% | 12.96% |
| 45 to 54 years | 42,185 | 14.45%, see rank | 14.17% | 14.09% |
| 55 to 64 years | 37,691 | 12.91%, see rank | 12.13% | 12.29% |
| 65 to 74 years | 23,381 | 8.01%, see rank | 7.18% | 7.64% |
| 75 to 84 | 13,371 | 4.58%, see rank | 4.10% | 4.25% |
| 85 years and over | 6,193 | 2.12%, see rank | 1.90% | 1.85% |
US Census 2010 data
Total population: 295,266
Median Age (
see rank)
| Winnebago County | 38.30 years old |
| Illinois | 36.60 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Winnebago County | 37.20 years old |
| Illinois | 35.20 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Winnebago County | 39.30 years old |
| Illinois | 37.90 years old |
| U.S. | 38.50 years old |
| | Winnebago County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 19,656 | 6.66%, see rank | 6.51% | 6.54% |
| 5 to 9 years | 20,109 | 6.81%, see rank | 6.70% | 6.59% |
| 10 to 14 years | 20,973 | 7.10%, see rank | 6.85% | 6.70% |
| 15 to 19 years | 20,576 | 6.97%, see rank | 7.19% | 7.14% |
| 20 to 24 years | 17,446 | 5.91%, see rank | 6.85% | 6.99% |
| 25 to 34 years | 36,601 | 12.40%, see rank | 13.84% | 13.30% |
| 35 to 44 years | 38,754 | 13.13%, see rank | 13.45% | 13.30% |
| 45 to 54 years | 44,139 | 14.95%, see rank | 14.58% | 14.58% |
| 55 to 64 years | 36,297 | 12.29%, see rank | 11.48% | 11.82% |
| 65 to 74 years | 21,498 | 7.28%, see rank | 6.62% | 7.03% |
| 75 to 84 | 13,243 | 4.49%, see rank | 4.09% | 4.23% |
| 85 years and over | 5,974 | 2.02%, see rank | 1.83% | 1.78% |
ACS 2008-2012 data
Total population: 294,433
Median Age (
see rank)
| Winnebago County | 38.40 years old |
| Illinois | 36.60 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Winnebago County | 37.30 years old |
| Illinois | 35.30 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Winnebago County | 39.40 years old |
| Illinois | 38.00 years old |
| U.S. | 38.50 years old |
| | Winnebago County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 19,603 | 6.66%, see rank | 6.50% | 6.51% |
| 5 to 9 years | 20,063 | 6.81%, see rank | 6.68% | 6.57% |
| 10 to 14 years | 20,811 | 7.07%, see rank | 6.82% | 6.68% |
| 15 to 19 years | 20,251 | 6.88%, see rank | 7.16% | 7.09% |
| 20 to 24 years | 17,599 | 5.98%, see rank | 6.88% | 7.04% |
| 25 to 34 years | 36,697 | 12.46%, see rank | 13.84% | 13.32% |
| 35 to 44 years | 38,674 | 13.14%, see rank | 13.49% | 13.34% |
| 45 to 54 years | 43,519 | 14.78%, see rank | 14.46% | 14.44% |
| 55 to 64 years | 36,257 | 12.31%, see rank | 11.52% | 11.84% |
| 65 to 74 years | 21,797 | 7.40%, see rank | 6.71% | 7.12% |
| 75 to 84 | 13,035 | 4.43%, see rank | 4.11% | 4.25% |
| 85 years and over | 6,127 | 2.08%, see rank | 1.83% | 1.78% |
ACS 2006-2010 data
Total population: 293,972
Median Age (
see rank)
| Winnebago County | 37.90 years old |
| Illinois | 36.20 years old |
| U.S. | 36.90 years old |
Median Age, Male (
see rank)
| Winnebago County | 36.70 years old |
| Illinois | 34.90 years old |
| U.S. | 35.60 years old |
Median Age, Female (
see rank)
| Winnebago County | 38.80 years old |
| Illinois | 37.60 years old |
| U.S. | 38.10 years old |
| | Winnebago County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 19,868 | 6.76%, see rank | 6.63% | 6.62% |
| 5 to 9 years | 20,263 | 6.89%, see rank | 6.78% | 6.62% |
| 10 to 14 years | 21,071 | 7.17%, see rank | 6.94% | 6.79% |
| 15 to 19 years | 20,804 | 7.08%, see rank | 7.31% | 7.28% |
| 20 to 24 years | 17,362 | 5.91%, see rank | 6.86% | 6.98% |
| 25 to 34 years | 36,854 | 12.54%, see rank | 13.78% | 13.22% |
| 35 to 44 years | 40,369 | 13.73%, see rank | 13.96% | 13.89% |
| 45 to 54 years | 43,753 | 14.88%, see rank | 14.55% | 14.57% |
| 55 to 64 years | 34,402 | 11.70%, see rank | 10.89% | 11.28% |
| 65 to 74 years | 20,220 | 6.88%, see rank | 6.36% | 6.74% |
| 75 to 84 | 13,123 | 4.46%, see rank | 4.17% | 4.30% |
| 85 years and over | 5,883 | 2.00%, see rank | 1.77% | 1.70% |
ACS 2005-2009 data
Total population: 295,803
Median Age (
see rank)
| Winnebago County | 37.20 years old |
| Illinois | 35.90 years old |
| U.S. | 36.50 years old |
Median Age, Male (
see rank)
| Winnebago County | 35.80 years old |
| Illinois | 34.60 years old |
| U.S. | 35.20 years old |
Median Age, Female (
see rank)
| Winnebago County | 38.60 years old |
| Illinois | 37.20 years old |
| U.S. | 37.90 years old |
| | Winnebago County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 20,183 | 6.82%, see rank | 6.97% | 6.92% |
| 5 to 9 years | 20,501 | 6.93%, see rank | 6.76% | 6.59% |
| 10 to 14 years | 21,290 | 7.20%, see rank | 6.96% | 6.83% |
| 15 to 19 years | 20,475 | 6.92%, see rank | 7.24% | 7.15% |
| 20 to 24 years | 18,394 | 6.22%, see rank | 7.08% | 7.02% |
| 25 to 34 years | 38,308 | 12.95%, see rank | 13.73% | 13.42% |
| 35 to 44 years | 41,296 | 13.96%, see rank | 14.23% | 14.18% |
| 45 to 54 years | 43,683 | 14.77%, see rank | 14.47% | 14.48% |
| 55 to 64 years | 33,169 | 11.21%, see rank | 10.43% | 10.81% |
| 65 to 74 years | 19,537 | 6.60%, see rank | 6.21% | 6.50% |
| 75 to 84 | 13,161 | 4.45%, see rank | 4.17% | 4.40% |
| 85 years and over | 5,806 | 1.96%, see rank | 1.74% | 1.71% |
US Census 2000 data
Total population: 278,418
Median Age (
see rank)
| Winnebago County | 35.90 years old |
| Illinois | 34.70 years old |
| U.S. | 35.30 years old |
Median Age, Male (
see rank)
| Winnebago County | 34.70 years old |
| Illinois | 33.30 years old |
| U.S. | 34.00 years old |
Median Age, Female (
see rank)
| Winnebago County | 37.00 years old |
| Illinois | 36.00 years old |
| U.S. | 36.50 years old |
| | Winnebago County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 19,752 | 7.09%, see rank | 7.06% | 6.81% |
| 5 to 9 years | 20,741 | 7.45%, see rank | 7.49% | 7.30% |
| 10 to 14 years | 21,044 | 7.56%, see rank | 7.29% | 7.29% |
| 15 to 19 years | 19,141 | 6.87%, see rank | 7.20% | 7.18% |
| 20 to 24 years | 16,132 | 5.79%, see rank | 6.85% | 6.74% |
| 25 to 34 years | 38,437 | 13.81%, see rank | 14.59% | 14.18% |
| 35 to 44 years | 44,645 | 16.04%, see rank | 15.97% | 16.04% |
| 45 to 54 years | 38,371 | 13.78%, see rank | 13.10% | 13.39% |
| 55 to 64 years | 24,705 | 8.87%, see rank | 8.38% | 8.63% |
| 65 to 74 years | 18,337 | 6.59%, see rank | 6.22% | 6.54% |
| 75 to 84 | 12,791 | 4.59%, see rank | 4.31% | 4.39% |
| 85 years and over | 4,322 | 1.55%, 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.
