Rock Island County Historical Age Data
ACS 2010-2014 data
Total population: 146,964
Median Age (
see rank)
| Rock Island County | 40.10 years old |
| Illinois | 37.00 years old |
| U.S. | 37.40 years old |
Median Age, Male (
see rank)
| Rock Island County | 38.50 years old |
| Illinois | 35.70 years old |
| U.S. | 36.10 years old |
Median Age, Female (
see rank)
| Rock Island County | 41.90 years old |
| Illinois | 38.40 years old |
| U.S. | 38.80 years old |
| | Rock Island County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 9,176 | 6.24%, see rank | 6.30% | 6.36% |
| 5 to 9 years | 9,154 | 6.23%, see rank | 6.58% | 6.51% |
| 10 to 14 years | 8,956 | 6.09%, see rank | 6.71% | 6.59% |
| 15 to 19 years | 9,457 | 6.43%, see rank | 6.94% | 6.85% |
| 20 to 24 years | 9,449 | 6.43%, see rank | 6.95% | 7.13% |
| 25 to 34 years | 18,297 | 12.45%, see rank | 13.84% | 13.47% |
| 35 to 44 years | 17,492 | 11.90%, see rank | 13.20% | 12.96% |
| 45 to 54 years | 20,012 | 13.62%, see rank | 14.17% | 14.09% |
| 55 to 64 years | 20,205 | 13.75%, see rank | 12.13% | 12.29% |
| 65 to 74 years | 13,077 | 8.90%, see rank | 7.18% | 7.64% |
| 75 to 84 | 7,718 | 5.25%, see rank | 4.10% | 4.25% |
| 85 years and over | 3,971 | 2.70%, see rank | 1.90% | 1.85% |
US Census 2010 data
Total population: 147,546
Median Age (
see rank)
| Rock Island County | 40.00 years old |
| Illinois | 36.60 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Rock Island County | 38.50 years old |
| Illinois | 35.20 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Rock Island County | 41.50 years old |
| Illinois | 37.90 years old |
| U.S. | 38.50 years old |
| | Rock Island County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 9,465 | 6.41%, see rank | 6.51% | 6.54% |
| 5 to 9 years | 8,983 | 6.09%, see rank | 6.70% | 6.59% |
| 10 to 14 years | 9,132 | 6.19%, see rank | 6.85% | 6.70% |
| 15 to 19 years | 9,722 | 6.59%, see rank | 7.19% | 7.14% |
| 20 to 24 years | 9,468 | 6.42%, see rank | 6.85% | 6.99% |
| 25 to 34 years | 18,462 | 12.51%, see rank | 13.84% | 13.30% |
| 35 to 44 years | 17,459 | 11.83%, see rank | 13.45% | 13.30% |
| 45 to 54 years | 21,426 | 14.52%, see rank | 14.58% | 14.58% |
| 55 to 64 years | 19,548 | 13.25%, see rank | 11.48% | 11.82% |
| 65 to 74 years | 12,203 | 8.27%, see rank | 6.62% | 7.03% |
| 75 to 84 | 7,976 | 5.41%, see rank | 4.09% | 4.23% |
| 85 years and over | 3,702 | 2.51%, see rank | 1.83% | 1.78% |
ACS 2008-2012 data
Total population: 147,504
Median Age (
see rank)
| Rock Island County | 40.10 years old |
| Illinois | 36.60 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Rock Island County | 38.30 years old |
| Illinois | 35.30 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Rock Island County | 41.80 years old |
| Illinois | 38.00 years old |
| U.S. | 38.50 years old |
| | Rock Island County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 9,538 | 6.47%, see rank | 6.50% | 6.51% |
| 5 to 9 years | 8,743 | 5.93%, see rank | 6.68% | 6.57% |
| 10 to 14 years | 9,289 | 6.30%, see rank | 6.82% | 6.68% |
| 15 to 19 years | 9,724 | 6.59%, see rank | 7.16% | 7.09% |
| 20 to 24 years | 9,451 | 6.41%, see rank | 6.88% | 7.04% |
| 25 to 34 years | 18,396 | 12.47%, see rank | 13.84% | 13.32% |
| 35 to 44 years | 17,535 | 11.89%, see rank | 13.49% | 13.34% |
| 45 to 54 years | 21,208 | 14.38%, see rank | 14.46% | 14.44% |
| 55 to 64 years | 19,575 | 13.27%, see rank | 11.52% | 11.84% |
| 65 to 74 years | 12,338 | 8.36%, see rank | 6.71% | 7.12% |
| 75 to 84 | 7,932 | 5.38%, see rank | 4.11% | 4.25% |
| 85 years and over | 3,775 | 2.56%, see rank | 1.83% | 1.78% |
ACS 2006-2010 data
Total population: 147,524
Median Age (
see rank)
| Rock Island County | 39.70 years old |
| Illinois | 36.20 years old |
| U.S. | 36.90 years old |
Median Age, Male (
see rank)
| Rock Island County | 38.10 years old |
| Illinois | 34.90 years old |
| U.S. | 35.60 years old |
Median Age, Female (
see rank)
| Rock Island County | 41.40 years old |
| Illinois | 37.60 years old |
| U.S. | 38.10 years old |
| | Rock Island County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 9,546 | 6.47%, see rank | 6.63% | 6.62% |
| 5 to 9 years | 9,306 | 6.31%, see rank | 6.78% | 6.62% |
| 10 to 14 years | 8,686 | 5.89%, see rank | 6.94% | 6.79% |
| 15 to 19 years | 9,969 | 6.76%, see rank | 7.31% | 7.28% |
| 20 to 24 years | 9,715 | 6.59%, see rank | 6.86% | 6.98% |
| 25 to 34 years | 18,270 | 12.38%, see rank | 13.78% | 13.22% |
| 35 to 44 years | 17,994 | 12.20%, see rank | 13.96% | 13.89% |
| 45 to 54 years | 21,949 | 14.88%, see rank | 14.55% | 14.57% |
| 55 to 64 years | 18,629 | 12.63%, see rank | 10.89% | 11.28% |
| 65 to 74 years | 11,773 | 7.98%, see rank | 6.36% | 6.74% |
| 75 to 84 | 8,158 | 5.53%, see rank | 4.17% | 4.30% |
| 85 years and over | 3,529 | 2.39%, see rank | 1.77% | 1.70% |
ACS 2005-2009 data
Total population: 146,670
Median Age (
see rank)
| Rock Island County | 39.10 years old |
| Illinois | 35.90 years old |
| U.S. | 36.50 years old |
Median Age, Male (
see rank)
| Rock Island County | 37.60 years old |
| Illinois | 34.60 years old |
| U.S. | 35.20 years old |
Median Age, Female (
see rank)
| Rock Island County | 40.70 years old |
| Illinois | 37.20 years old |
| U.S. | 37.90 years old |
| | Rock Island County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 9,560 | 6.52%, see rank | 6.97% | 6.92% |
| 5 to 9 years | 9,042 | 6.16%, see rank | 6.76% | 6.59% |
| 10 to 14 years | 8,678 | 5.92%, see rank | 6.96% | 6.83% |
| 15 to 19 years | 9,829 | 6.70%, see rank | 7.24% | 7.15% |
| 20 to 24 years | 9,938 | 6.78%, see rank | 7.08% | 7.02% |
| 25 to 34 years | 19,184 | 13.08%, see rank | 13.73% | 13.42% |
| 35 to 44 years | 17,773 | 12.12%, see rank | 14.23% | 14.18% |
| 45 to 54 years | 21,977 | 14.98%, see rank | 14.47% | 14.48% |
| 55 to 64 years | 17,628 | 12.02%, see rank | 10.43% | 10.81% |
| 65 to 74 years | 11,474 | 7.82%, see rank | 6.21% | 6.50% |
| 75 to 84 | 8,238 | 5.62%, see rank | 4.17% | 4.40% |
| 85 years and over | 3,349 | 2.28%, see rank | 1.74% | 1.71% |
US Census 2000 data
Total population: 149,374
Median Age (
see rank)
| Rock Island County | 37.80 years old |
| Illinois | 34.70 years old |
| U.S. | 35.30 years old |
Median Age, Male (
see rank)
| Rock Island County | 36.40 years old |
| Illinois | 33.30 years old |
| U.S. | 34.00 years old |
Median Age, Female (
see rank)
| Rock Island County | 39.20 years old |
| Illinois | 36.00 years old |
| U.S. | 36.50 years old |
| | Rock Island County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 9,486 | 6.35%, see rank | 7.06% | 6.81% |
| 5 to 9 years | 9,598 | 6.43%, see rank | 7.49% | 7.30% |
| 10 to 14 years | 10,160 | 6.80%, see rank | 7.29% | 7.29% |
| 15 to 19 years | 10,993 | 7.36%, see rank | 7.20% | 7.18% |
| 20 to 24 years | 10,185 | 6.82%, see rank | 6.85% | 6.74% |
| 25 to 34 years | 18,395 | 12.31%, see rank | 14.59% | 14.18% |
| 35 to 44 years | 22,372 | 14.98%, see rank | 15.97% | 16.04% |
| 45 to 54 years | 21,069 | 14.10%, see rank | 13.10% | 13.39% |
| 55 to 64 years | 14,552 | 9.74%, see rank | 8.38% | 8.63% |
| 65 to 74 years | 11,372 | 7.61%, see rank | 6.22% | 6.54% |
| 75 to 84 | 8,181 | 5.48%, see rank | 4.31% | 4.39% |
| 85 years and over | 3,011 | 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.
