O Fallon, MO Historical Age Data
ACS 2010-2014 data
Total population: 81,978
Median Age (
see rank)
| O Fallon, MO | 35.00 years old |
| Missouri | 38.10 years old |
| U.S. | 37.40 years old |
Median Age, Male (
see rank)
| O Fallon, MO | 33.90 years old |
| Missouri | 36.70 years old |
| U.S. | 36.10 years old |
Median Age, Female (
see rank)
| O Fallon, MO | 36.30 years old |
| Missouri | 39.50 years old |
| U.S. | 38.80 years old |
| | O Fallon, MO | % of the Total Population | Missouri | U.S. |
| Under 5 years | 6,025 | 7.35%, see rank | 6.29% | 6.36% |
| 5 to 9 years | 7,136 | 8.70%, see rank | 6.50% | 6.51% |
| 10 to 14 years | 7,211 | 8.80%, see rank | 6.55% | 6.59% |
| 15 to 19 years | 5,520 | 6.73%, see rank | 6.78% | 6.85% |
| 20 to 24 years | 4,372 | 5.33%, see rank | 7.04% | 7.13% |
| 25 to 34 years | 10,671 | 13.02%, see rank | 13.15% | 13.47% |
| 35 to 44 years | 13,204 | 16.11%, see rank | 12.20% | 12.96% |
| 45 to 54 years | 12,055 | 14.71%, see rank | 14.18% | 14.09% |
| 55 to 64 years | 7,722 | 9.42%, see rank | 12.67% | 12.29% |
| 65 to 74 years | 4,303 | 5.25%, see rank | 8.07% | 7.64% |
| 75 to 84 | 2,619 | 3.19%, see rank | 4.59% | 4.25% |
| 85 years and over | 1,140 | 1.39%, see rank | 1.98% | 1.85% |
US Census 2010 data
Total population: 79,329
Median Age (
see rank)
| O Fallon, MO | 34.30 years old |
| Missouri | 37.90 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| O Fallon, MO | 33.50 years old |
| Missouri | 36.50 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| O Fallon, MO | 35.00 years old |
| Missouri | 39.20 years old |
| U.S. | 38.50 years old |
| | O Fallon, MO | % of the Total Population | Missouri | U.S. |
| Under 5 years | 6,347 | 8.00%, see rank | 6.52% | 6.54% |
| 5 to 9 years | 7,129 | 8.99%, see rank | 6.52% | 6.59% |
| 10 to 14 years | 6,644 | 8.38%, see rank | 6.63% | 6.70% |
| 15 to 19 years | 5,489 | 6.92%, see rank | 7.08% | 7.14% |
| 20 to 24 years | 3,807 | 4.80%, see rank | 6.90% | 6.99% |
| 25 to 34 years | 11,119 | 14.02%, see rank | 12.95% | 13.30% |
| 35 to 44 years | 13,371 | 16.86%, see rank | 12.50% | 13.30% |
| 45 to 54 years | 11,705 | 14.76%, see rank | 14.84% | 14.58% |
| 55 to 64 years | 6,648 | 8.38%, see rank | 12.08% | 11.82% |
| 65 to 74 years | 3,930 | 4.95%, see rank | 7.52% | 7.03% |
| 75 to 84 | 2,275 | 2.87%, see rank | 4.58% | 4.23% |
| 85 years and over | 865 | 1.09%, see rank | 1.90% | 1.78% |
ACS 2008-2012 data
Total population: 79,073
Median Age (
see rank)
| O Fallon, MO | 33.90 years old |
| Missouri | 37.90 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| O Fallon, MO | 33.20 years old |
| Missouri | 36.50 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| O Fallon, MO | 34.70 years old |
| Missouri | 39.20 years old |
| U.S. | 38.50 years old |
| | O Fallon, MO | % of the Total Population | Missouri | U.S. |
| Under 5 years | 6,279 | 7.94%, see rank | 6.44% | 6.51% |
| 5 to 9 years | 6,984 | 8.83%, see rank | 6.51% | 6.57% |
| 10 to 14 years | 6,936 | 8.77%, see rank | 6.63% | 6.68% |
| 15 to 19 years | 5,592 | 7.07%, see rank | 7.04% | 7.09% |
| 20 to 24 years | 4,268 | 5.40%, see rank | 6.95% | 7.04% |
| 25 to 34 years | 10,839 | 13.71%, see rank | 12.96% | 13.32% |
| 35 to 44 years | 12,784 | 16.17%, see rank | 12.57% | 13.34% |
| 45 to 54 years | 11,643 | 14.72%, see rank | 14.66% | 14.44% |
| 55 to 64 years | 6,591 | 8.34%, see rank | 12.13% | 11.84% |
| 65 to 74 years | 4,149 | 5.25%, see rank | 7.60% | 7.12% |
| 75 to 84 | 2,044 | 2.58%, see rank | 4.57% | 4.25% |
| 85 years and over | 964 | 1.22%, see rank | 1.93% | 1.78% |
ACS 2006-2010 data
Total population: 74,777
Median Age (
see rank)
| O Fallon, MO | 33.50 years old |
| Missouri | 37.60 years old |
| U.S. | 36.90 years old |
Median Age, Male (
see rank)
| O Fallon, MO | 33.10 years old |
| Missouri | 36.20 years old |
| U.S. | 35.60 years old |
Median Age, Female (
see rank)
| O Fallon, MO | 33.90 years old |
| Missouri | 38.90 years old |
| U.S. | 38.10 years old |
| | O Fallon, MO | % of the Total Population | Missouri | U.S. |
| Under 5 years | 6,297 | 8.42%, see rank | 6.53% | 6.62% |
| 5 to 9 years | 6,340 | 8.48%, see rank | 6.51% | 6.62% |
| 10 to 14 years | 6,818 | 9.12%, see rank | 6.77% | 6.79% |
| 15 to 19 years | 5,476 | 7.32%, see rank | 7.26% | 7.28% |
| 20 to 24 years | 3,836 | 5.13%, see rank | 6.96% | 6.98% |
| 25 to 34 years | 10,632 | 14.22%, see rank | 12.74% | 13.22% |
| 35 to 44 years | 12,835 | 17.16%, see rank | 13.15% | 13.89% |
| 45 to 54 years | 10,479 | 14.01%, see rank | 14.84% | 14.57% |
| 55 to 64 years | 6,034 | 8.07%, see rank | 11.52% | 11.28% |
| 65 to 74 years | 3,678 | 4.92%, see rank | 7.25% | 6.74% |
| 75 to 84 | 1,638 | 2.19%, see rank | 4.61% | 4.30% |
| 85 years and over | 714 | 0.95%, see rank | 1.87% | 1.70% |
ACS 2005-2009 data
Total population: 74,767
Median Age (
see rank)
| O Fallon, MO | 33.30 years old |
| Missouri | 37.30 years old |
| U.S. | 36.50 years old |
Median Age, Male (
see rank)
| O Fallon, MO | 32.90 years old |
| Missouri | 35.90 years old |
| U.S. | 35.20 years old |
Median Age, Female (
see rank)
| O Fallon, MO | 33.70 years old |
| Missouri | 38.70 years old |
| U.S. | 37.90 years old |
| | O Fallon, MO | % of the Total Population | Missouri | U.S. |
| Under 5 years | 6,449 | 8.63%, see rank | 6.70% | 6.92% |
| 5 to 9 years | 6,192 | 8.28%, see rank | 6.45% | 6.59% |
| 10 to 14 years | 6,948 | 9.29%, see rank | 6.78% | 6.83% |
| 15 to 19 years | 4,946 | 6.62%, see rank | 7.16% | 7.15% |
| 20 to 24 years | 3,809 | 5.09%, see rank | 7.13% | 7.02% |
| 25 to 34 years | 11,433 | 15.29%, see rank | 12.83% | 13.42% |
| 35 to 44 years | 13,072 | 17.48%, see rank | 13.57% | 14.18% |
| 45 to 54 years | 10,087 | 13.49%, see rank | 14.77% | 14.48% |
| 55 to 64 years | 6,024 | 8.06%, see rank | 11.12% | 10.81% |
| 65 to 74 years | 3,522 | 4.71%, see rank | 6.95% | 6.50% |
| 75 to 84 | 1,537 | 2.06%, see rank | 4.67% | 4.40% |
| 85 years and over | 748 | 1.00%, see rank | 1.88% | 1.71% |
US Census 2000 data
Total population: 46,169
Median Age (
see rank)
| O Fallon, MO | 31.10 years old |
| Missouri | 36.10 years old |
| U.S. | 35.30 years old |
Median Age, Male (
see rank)
| O Fallon, MO | 30.90 years old |
| Missouri | 34.80 years old |
| U.S. | 34.00 years old |
Median Age, Female (
see rank)
| O Fallon, MO | 31.20 years old |
| Missouri | 37.40 years old |
| U.S. | 36.50 years old |
| | O Fallon, MO | % of the Total Population | Missouri | U.S. |
| Under 5 years | 4,847 | 10.50%, see rank | 6.61% | 6.81% |
| 5 to 9 years | 4,568 | 9.89%, see rank | 7.13% | 7.30% |
| 10 to 14 years | 4,007 | 8.68%, see rank | 7.36% | 7.29% |
| 15 to 19 years | 2,897 | 6.27%, see rank | 7.39% | 7.18% |
| 20 to 24 years | 2,040 | 4.42%, see rank | 6.60% | 6.74% |
| 25 to 34 years | 8,582 | 18.59%, see rank | 13.20% | 14.18% |
| 35 to 44 years | 9,318 | 20.18%, see rank | 15.86% | 16.04% |
| 45 to 54 years | 4,486 | 9.72%, see rank | 13.27% | 13.39% |
| 55 to 64 years | 2,573 | 5.57%, see rank | 9.07% | 8.63% |
| 65 to 74 years | 1,771 | 3.84%, see rank | 7.03% | 6.54% |
| 75 to 84 | 818 | 1.77%, see rank | 4.71% | 4.39% |
| 85 years and over | 262 | 0.57%, see rank | 1.76% | 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.
