Obrien County Historical Age Data
ACS 2010-2014 data
Total population: 14,173
Median Age (
see rank)
| Obrien County | 44.00 years old |
| Iowa | 38.00 years old |
| U.S. | 37.40 years old |
Median Age, Male (
see rank)
| Obrien County | 40.40 years old |
| Iowa | 36.70 years old |
| U.S. | 36.10 years old |
Median Age, Female (
see rank)
| Obrien County | 47.10 years old |
| Iowa | 39.40 years old |
| U.S. | 38.80 years old |
| | Obrien County | % of the Total Population | Iowa | U.S. |
| Under 5 years | 851 | 6.00%, see rank | 6.39% | 6.36% |
| 5 to 9 years | 807 | 5.69%, see rank | 6.62% | 6.51% |
| 10 to 14 years | 1,068 | 7.54%, see rank | 6.58% | 6.59% |
| 15 to 19 years | 924 | 6.52%, see rank | 6.96% | 6.85% |
| 20 to 24 years | 643 | 4.54%, see rank | 7.21% | 7.13% |
| 25 to 34 years | 1,462 | 10.32%, see rank | 12.65% | 13.47% |
| 35 to 44 years | 1,510 | 10.65%, see rank | 11.80% | 12.96% |
| 45 to 54 years | 1,992 | 14.05%, see rank | 13.73% | 14.09% |
| 55 to 64 years | 2,014 | 14.21%, see rank | 12.80% | 12.29% |
| 65 to 74 years | 1,200 | 8.47%, see rank | 7.81% | 7.64% |
| 75 to 84 | 1,110 | 7.83%, see rank | 4.98% | 4.25% |
| 85 years and over | 592 | 4.18%, see rank | 2.48% | 1.85% |
US Census 2010 data
Total population: 14,398
Median Age (
see rank)
| Obrien County | 43.60 years old |
| Iowa | 38.10 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Obrien County | 40.80 years old |
| Iowa | 36.60 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Obrien County | 46.60 years old |
| Iowa | 39.50 years old |
| U.S. | 38.50 years old |
| | Obrien County | % of the Total Population | Iowa | U.S. |
| Under 5 years | 922 | 6.40%, see rank | 6.63% | 6.54% |
| 5 to 9 years | 937 | 6.51%, see rank | 6.59% | 6.59% |
| 10 to 14 years | 948 | 6.58%, see rank | 6.59% | 6.70% |
| 15 to 19 years | 887 | 6.16%, see rank | 7.12% | 7.14% |
| 20 to 24 years | 656 | 4.56%, see rank | 7.00% | 6.99% |
| 25 to 34 years | 1,586 | 11.02%, see rank | 12.56% | 13.30% |
| 35 to 44 years | 1,474 | 10.24%, see rank | 11.97% | 13.30% |
| 45 to 54 years | 2,181 | 15.15%, see rank | 14.43% | 14.58% |
| 55 to 64 years | 1,870 | 12.99%, see rank | 12.24% | 11.82% |
| 65 to 74 years | 1,178 | 8.18%, see rank | 7.37% | 7.03% |
| 75 to 84 | 1,179 | 8.19%, see rank | 5.04% | 4.23% |
| 85 years and over | 580 | 4.03%, see rank | 2.45% | 1.78% |
ACS 2008-2012 data
Total population: 14,302
Median Age (
see rank)
| Obrien County | 44.40 years old |
| Iowa | 38.00 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Obrien County | 40.90 years old |
| Iowa | 36.60 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Obrien County | 46.50 years old |
| Iowa | 39.40 years old |
| U.S. | 38.50 years old |
| | Obrien County | % of the Total Population | Iowa | U.S. |
| Under 5 years | 848 | 5.93%, see rank | 6.53% | 6.51% |
| 5 to 9 years | 771 | 5.39%, see rank | 6.58% | 6.57% |
| 10 to 14 years | 1,110 | 7.76%, see rank | 6.60% | 6.68% |
| 15 to 19 years | 925 | 6.47%, see rank | 7.14% | 7.09% |
| 20 to 24 years | 633 | 4.43%, see rank | 7.08% | 7.04% |
| 25 to 34 years | 1,510 | 10.56%, see rank | 12.55% | 13.32% |
| 35 to 44 years | 1,462 | 10.22%, see rank | 12.02% | 13.34% |
| 45 to 54 years | 2,189 | 15.31%, see rank | 14.28% | 14.44% |
| 55 to 64 years | 1,892 | 13.23%, see rank | 12.27% | 11.84% |
| 65 to 74 years | 1,204 | 8.42%, see rank | 7.45% | 7.12% |
| 75 to 84 | 1,183 | 8.27%, see rank | 5.08% | 4.25% |
| 85 years and over | 575 | 4.02%, see rank | 2.42% | 1.78% |
ACS 2006-2010 data
Total population: 14,419
Median Age (
see rank)
| Obrien County | 44.40 years old |
| Iowa | 38.00 years old |
| U.S. | 36.90 years old |
Median Age, Male (
see rank)
| Obrien County | 41.50 years old |
| Iowa | 36.60 years old |
| U.S. | 35.60 years old |
Median Age, Female (
see rank)
| Obrien County | 45.90 years old |
| Iowa | 39.30 years old |
| U.S. | 38.10 years old |
| | Obrien County | % of the Total Population | Iowa | U.S. |
| Under 5 years | 904 | 6.27%, see rank | 6.56% | 6.62% |
| 5 to 9 years | 920 | 6.38%, see rank | 6.57% | 6.62% |
| 10 to 14 years | 947 | 6.57%, see rank | 6.64% | 6.79% |
| 15 to 19 years | 968 | 6.71%, see rank | 7.28% | 7.28% |
| 20 to 24 years | 684 | 4.74%, see rank | 7.14% | 6.98% |
| 25 to 34 years | 1,398 | 9.70%, see rank | 12.25% | 13.22% |
| 35 to 44 years | 1,514 | 10.50%, see rank | 12.56% | 13.89% |
| 45 to 54 years | 2,337 | 16.21%, see rank | 14.61% | 14.57% |
| 55 to 64 years | 1,730 | 12.00%, see rank | 11.58% | 11.28% |
| 65 to 74 years | 1,237 | 8.58%, see rank | 7.21% | 6.74% |
| 75 to 84 | 1,185 | 8.22%, see rank | 5.24% | 4.30% |
| 85 years and over | 595 | 4.13%, see rank | 2.36% | 1.70% |
ACS 2005-2009 data
Total population: 14,062
Median Age (
see rank)
| Obrien County | 44.40 years old |
| Iowa | 37.90 years old |
| U.S. | 36.50 years old |
Median Age, Male (
see rank)
| Obrien County | 41.50 years old |
| Iowa | 36.50 years old |
| U.S. | 35.20 years old |
Median Age, Female (
see rank)
| Obrien County | 46.30 years old |
| Iowa | 39.30 years old |
| U.S. | 37.90 years old |
| | Obrien County | % of the Total Population | Iowa | U.S. |
| Under 5 years | 861 | 6.12%, see rank | 6.61% | 6.92% |
| 5 to 9 years | 879 | 6.25%, see rank | 6.38% | 6.59% |
| 10 to 14 years | 882 | 6.27%, see rank | 6.59% | 6.83% |
| 15 to 19 years | 1,015 | 7.22%, see rank | 7.37% | 7.15% |
| 20 to 24 years | 813 | 5.78%, see rank | 7.65% | 7.02% |
| 25 to 34 years | 1,139 | 8.10%, see rank | 11.90% | 13.42% |
| 35 to 44 years | 1,588 | 11.29%, see rank | 12.95% | 14.18% |
| 45 to 54 years | 2,303 | 16.38%, see rank | 14.71% | 14.48% |
| 55 to 64 years | 1,528 | 10.87%, see rank | 11.11% | 10.81% |
| 65 to 74 years | 1,231 | 8.75%, see rank | 7.05% | 6.50% |
| 75 to 84 | 1,231 | 8.75%, see rank | 5.30% | 4.40% |
| 85 years and over | 592 | 4.21%, see rank | 2.38% | 1.71% |
US Census 2000 data
Total population: 15,102
Median Age (
see rank)
| Obrien County | 40.70 years old |
| Iowa | 36.60 years old |
| U.S. | 35.30 years old |
Median Age, Male (
see rank)
| Obrien County | 38.50 years old |
| Iowa | 35.20 years old |
| U.S. | 34.00 years old |
Median Age, Female (
see rank)
| Obrien County | 43.00 years old |
| Iowa | 38.00 years old |
| U.S. | 36.50 years old |
| | Obrien County | % of the Total Population | Iowa | U.S. |
| Under 5 years | 889 | 5.89%, see rank | 6.44% | 6.81% |
| 5 to 9 years | 964 | 6.38%, see rank | 6.92% | 7.30% |
| 10 to 14 years | 1,123 | 7.44%, see rank | 7.19% | 7.29% |
| 15 to 19 years | 1,198 | 7.93%, see rank | 7.74% | 7.18% |
| 20 to 24 years | 753 | 4.99%, see rank | 6.96% | 6.74% |
| 25 to 34 years | 1,457 | 9.65%, see rank | 12.41% | 14.18% |
| 35 to 44 years | 2,188 | 14.49%, see rank | 15.21% | 16.04% |
| 45 to 54 years | 1,944 | 12.87%, see rank | 13.42% | 13.39% |
| 55 to 64 years | 1,395 | 9.24%, see rank | 8.80% | 8.63% |
| 65 to 74 years | 1,471 | 9.74%, see rank | 7.24% | 6.54% |
| 75 to 84 | 1,154 | 7.64%, see rank | 5.44% | 4.39% |
| 85 years and over | 566 | 3.75%, see rank | 2.23% | 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.
