Rock County Historical Age Data
ACS 2010-2014 data
Total population: 160,465
Median Age (
see rank)
| Rock County | 38.80 years old |
| Wisconsin | 38.80 years old |
| U.S. | 37.40 years old |
Median Age, Male (
see rank)
| Rock County | 37.60 years old |
| Wisconsin | 37.70 years old |
| U.S. | 36.10 years old |
Median Age, Female (
see rank)
| Rock County | 40.00 years old |
| Wisconsin | 40.00 years old |
| U.S. | 38.80 years old |
| | Rock County | % of the Total Population | Wisconsin | U.S. |
| Under 5 years | 9,980 | 6.22%, see rank | 6.07% | 6.36% |
| 5 to 9 years | 11,281 | 7.03%, see rank | 6.39% | 6.51% |
| 10 to 14 years | 10,951 | 6.82%, see rank | 6.55% | 6.59% |
| 15 to 19 years | 10,862 | 6.77%, see rank | 6.85% | 6.85% |
| 20 to 24 years | 9,906 | 6.17%, see rank | 6.87% | 7.13% |
| 25 to 34 years | 19,970 | 12.45%, see rank | 12.72% | 13.47% |
| 35 to 44 years | 20,570 | 12.82%, see rank | 12.29% | 12.96% |
| 45 to 54 years | 23,564 | 14.68%, see rank | 14.81% | 14.09% |
| 55 to 64 years | 20,447 | 12.74%, see rank | 13.05% | 12.29% |
| 65 to 74 years | 12,337 | 7.69%, see rank | 7.68% | 7.64% |
| 75 to 84 | 7,264 | 4.53%, see rank | 4.57% | 4.25% |
| 85 years and over | 3,333 | 2.08%, see rank | 2.14% | 1.85% |
US Census 2010 data
Total population: 160,331
Median Age (
see rank)
| Rock County | 38.00 years old |
| Wisconsin | 38.50 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Rock County | 36.90 years old |
| Wisconsin | 37.30 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Rock County | 39.10 years old |
| Wisconsin | 39.60 years old |
| U.S. | 38.50 years old |
| | Rock County | % of the Total Population | Wisconsin | U.S. |
| Under 5 years | 10,445 | 6.51%, see rank | 6.30% | 6.54% |
| 5 to 9 years | 11,116 | 6.93%, see rank | 6.48% | 6.59% |
| 10 to 14 years | 11,427 | 7.13%, see rank | 6.61% | 6.70% |
| 15 to 19 years | 11,581 | 7.22%, see rank | 7.02% | 7.14% |
| 20 to 24 years | 9,409 | 5.87%, see rank | 6.80% | 6.99% |
| 25 to 34 years | 20,159 | 12.57%, see rank | 12.69% | 13.30% |
| 35 to 44 years | 21,393 | 13.34%, see rank | 12.76% | 13.30% |
| 45 to 54 years | 24,117 | 15.04%, see rank | 15.36% | 14.58% |
| 55 to 64 years | 18,925 | 11.80%, see rank | 12.31% | 11.82% |
| 65 to 74 years | 11,466 | 7.15%, see rank | 7.04% | 7.03% |
| 75 to 84 | 7,256 | 4.53%, see rank | 4.54% | 4.23% |
| 85 years and over | 3,037 | 1.89%, see rank | 2.08% | 1.78% |
ACS 2008-2012 data
Total population: 160,356
Median Age (
see rank)
| Rock County | 38.30 years old |
| Wisconsin | 38.50 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Rock County | 37.20 years old |
| Wisconsin | 37.40 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Rock County | 39.20 years old |
| Wisconsin | 39.60 years old |
| U.S. | 38.50 years old |
| | Rock County | % of the Total Population | Wisconsin | U.S. |
| Under 5 years | 10,344 | 6.45%, see rank | 6.25% | 6.51% |
| 5 to 9 years | 11,476 | 7.16%, see rank | 6.45% | 6.57% |
| 10 to 14 years | 11,032 | 6.88%, see rank | 6.62% | 6.68% |
| 15 to 19 years | 11,415 | 7.12%, see rank | 7.03% | 7.09% |
| 20 to 24 years | 9,573 | 5.97%, see rank | 6.83% | 7.04% |
| 25 to 34 years | 20,132 | 12.55%, see rank | 12.66% | 13.32% |
| 35 to 44 years | 21,406 | 13.35%, see rank | 12.79% | 13.34% |
| 45 to 54 years | 23,969 | 14.95%, see rank | 15.24% | 14.44% |
| 55 to 64 years | 19,144 | 11.94%, see rank | 12.35% | 11.84% |
| 65 to 74 years | 11,600 | 7.23%, see rank | 7.12% | 7.12% |
| 75 to 84 | 7,400 | 4.61%, see rank | 4.61% | 4.25% |
| 85 years and over | 2,865 | 1.79%, see rank | 2.05% | 1.78% |
ACS 2006-2010 data
Total population: 159,964
Median Age (
see rank)
| Rock County | 37.50 years old |
| Wisconsin | 38.10 years old |
| U.S. | 36.90 years old |
Median Age, Male (
see rank)
| Rock County | 36.50 years old |
| Wisconsin | 37.00 years old |
| U.S. | 35.60 years old |
Median Age, Female (
see rank)
| Rock County | 38.50 years old |
| Wisconsin | 39.20 years old |
| U.S. | 38.10 years old |
| | Rock County | % of the Total Population | Wisconsin | U.S. |
| Under 5 years | 10,511 | 6.57%, see rank | 6.29% | 6.62% |
| 5 to 9 years | 11,287 | 7.06%, see rank | 6.45% | 6.62% |
| 10 to 14 years | 11,525 | 7.20%, see rank | 6.77% | 6.79% |
| 15 to 19 years | 11,602 | 7.25%, see rank | 7.21% | 7.28% |
| 20 to 24 years | 9,881 | 6.18%, see rank | 6.95% | 6.98% |
| 25 to 34 years | 19,854 | 12.41%, see rank | 12.42% | 13.22% |
| 35 to 44 years | 22,450 | 14.03%, see rank | 13.54% | 13.89% |
| 45 to 54 years | 24,001 | 15.00%, see rank | 15.40% | 14.57% |
| 55 to 64 years | 17,904 | 11.19%, see rank | 11.58% | 11.28% |
| 65 to 74 years | 10,932 | 6.83%, see rank | 6.74% | 6.74% |
| 75 to 84 | 7,471 | 4.67%, see rank | 4.66% | 4.30% |
| 85 years and over | 2,546 | 1.59%, see rank | 1.99% | 1.70% |
ACS 2005-2009 data
Total population: 158,829
Median Age (
see rank)
| Rock County | 37.30 years old |
| Wisconsin | 37.80 years old |
| U.S. | 36.50 years old |
Median Age, Male (
see rank)
| Rock County | 36.10 years old |
| Wisconsin | 36.70 years old |
| U.S. | 35.20 years old |
Median Age, Female (
see rank)
| Rock County | 38.50 years old |
| Wisconsin | 39.00 years old |
| U.S. | 37.90 years old |
| | Rock County | % of the Total Population | Wisconsin | U.S. |
| Under 5 years | 10,574 | 6.66%, see rank | 6.37% | 6.92% |
| 5 to 9 years | 10,411 | 6.55%, see rank | 6.28% | 6.59% |
| 10 to 14 years | 11,613 | 7.31%, see rank | 6.64% | 6.83% |
| 15 to 19 years | 11,448 | 7.21%, see rank | 7.31% | 7.15% |
| 20 to 24 years | 10,049 | 6.33%, see rank | 7.44% | 7.02% |
| 25 to 34 years | 20,209 | 12.72%, see rank | 12.28% | 13.42% |
| 35 to 44 years | 22,775 | 14.34%, see rank | 14.03% | 14.18% |
| 45 to 54 years | 23,838 | 15.01%, see rank | 15.37% | 14.48% |
| 55 to 64 years | 17,174 | 10.81%, see rank | 11.09% | 10.81% |
| 65 to 74 years | 10,845 | 6.83%, see rank | 6.60% | 6.50% |
| 75 to 84 | 7,263 | 4.57%, see rank | 4.65% | 4.40% |
| 85 years and over | 2,630 | 1.66%, see rank | 1.94% | 1.71% |
US Census 2000 data
Total population: 152,307
Median Age (
see rank)
| Rock County | 35.90 years old |
| Wisconsin | 36.00 years old |
| U.S. | 35.30 years old |
Median Age, Male (
see rank)
| Rock County | 34.70 years old |
| Wisconsin | 35.00 years old |
| U.S. | 34.00 years old |
Median Age, Female (
see rank)
| Rock County | 36.90 years old |
| Wisconsin | 37.10 years old |
| U.S. | 36.50 years old |
| | Rock County | % of the Total Population | Wisconsin | U.S. |
| Under 5 years | 10,263 | 6.74%, see rank | 6.38% | 6.81% |
| 5 to 9 years | 11,460 | 7.52%, see rank | 7.08% | 7.30% |
| 10 to 14 years | 11,828 | 7.77%, see rank | 7.51% | 7.29% |
| 15 to 19 years | 10,930 | 7.18%, see rank | 7.59% | 7.18% |
| 20 to 24 years | 8,995 | 5.91%, see rank | 6.66% | 6.74% |
| 25 to 34 years | 20,606 | 13.53%, see rank | 13.17% | 14.18% |
| 35 to 44 years | 24,810 | 16.29%, see rank | 16.32% | 16.04% |
| 45 to 54 years | 20,645 | 13.55%, see rank | 13.65% | 13.39% |
| 55 to 64 years | 13,375 | 8.78%, see rank | 8.53% | 8.63% |
| 65 to 74 years | 10,198 | 6.70%, see rank | 6.62% | 6.54% |
| 75 to 84 | 6,645 | 4.36%, see rank | 4.69% | 4.39% |
| 85 years and over | 2,552 | 1.68%, see rank | 1.78% | 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.
