O Fallon, IL Historical Age Data
ACS 2010-2014 data
Total population: 29,100
Median Age (
see rank)
O Fallon, IL | 35.80 years old |
Illinois | 37.00 years old |
U.S. | 37.40 years old |
Median Age, Male (
see rank)
O Fallon, IL | 34.60 years old |
Illinois | 35.70 years old |
U.S. | 36.10 years old |
Median Age, Female (
see rank)
O Fallon, IL | 36.70 years old |
Illinois | 38.40 years old |
U.S. | 38.80 years old |
| O Fallon, IL | % of the Total Population | Illinois | U.S. |
Under 5 years | 2,009 | 6.90%, see rank | 6.30% | 6.36% |
5 to 9 years | 2,374 | 8.16%, see rank | 6.58% | 6.51% |
10 to 14 years | 2,377 | 8.17%, see rank | 6.71% | 6.59% |
15 to 19 years | 2,156 | 7.41%, see rank | 6.94% | 6.85% |
20 to 24 years | 1,766 | 6.07%, see rank | 6.95% | 7.13% |
25 to 34 years | 3,443 | 11.83%, see rank | 13.84% | 13.47% |
35 to 44 years | 4,907 | 16.86%, see rank | 13.20% | 12.96% |
45 to 54 years | 4,125 | 14.18%, see rank | 14.17% | 14.09% |
55 to 64 years | 3,106 | 10.67%, see rank | 12.13% | 12.29% |
65 to 74 years | 1,683 | 5.78%, see rank | 7.18% | 7.64% |
75 to 84 | 921 | 3.16%, see rank | 4.10% | 4.25% |
85 years and over | 233 | 0.80%, see rank | 1.90% | 1.85% |
US Census 2010 data
Total population: 28,281
Median Age (
see rank)
O Fallon, IL | 36.40 years old |
Illinois | 36.60 years old |
U.S. | 37.20 years old |
Median Age, Male (
see rank)
O Fallon, IL | 35.00 years old |
Illinois | 35.20 years old |
U.S. | 35.80 years old |
Median Age, Female (
see rank)
O Fallon, IL | 37.70 years old |
Illinois | 37.90 years old |
U.S. | 38.50 years old |
| O Fallon, IL | % of the Total Population | Illinois | U.S. |
Under 5 years | 1,789 | 6.33%, see rank | 6.51% | 6.54% |
5 to 9 years | 2,205 | 7.80%, see rank | 6.70% | 6.59% |
10 to 14 years | 2,310 | 8.17%, see rank | 6.85% | 6.70% |
15 to 19 years | 2,159 | 7.63%, see rank | 7.19% | 7.14% |
20 to 24 years | 1,593 | 5.63%, see rank | 6.85% | 6.99% |
25 to 34 years | 3,523 | 12.46%, see rank | 13.84% | 13.30% |
35 to 44 years | 4,364 | 15.43%, see rank | 13.45% | 13.30% |
45 to 54 years | 4,672 | 16.52%, see rank | 14.58% | 14.58% |
55 to 64 years | 3,112 | 11.00%, see rank | 11.48% | 11.82% |
65 to 74 years | 1,491 | 5.27%, see rank | 6.62% | 7.03% |
75 to 84 | 812 | 2.87%, see rank | 4.09% | 4.23% |
85 years and over | 251 | 0.89%, see rank | 1.83% | 1.78% |
ACS 2008-2012 data
Total population: 28,377
Median Age (
see rank)
O Fallon, IL | 34.90 years old |
Illinois | 36.60 years old |
U.S. | 37.20 years old |
Median Age, Male (
see rank)
O Fallon, IL | 34.00 years old |
Illinois | 35.30 years old |
U.S. | 35.80 years old |
Median Age, Female (
see rank)
O Fallon, IL | 35.80 years old |
Illinois | 38.00 years old |
U.S. | 38.50 years old |
| O Fallon, IL | % of the Total Population | Illinois | U.S. |
Under 5 years | 2,229 | 7.85%, see rank | 6.50% | 6.51% |
5 to 9 years | 2,340 | 8.25%, see rank | 6.68% | 6.57% |
10 to 14 years | 2,184 | 7.70%, see rank | 6.82% | 6.68% |
15 to 19 years | 2,209 | 7.78%, see rank | 7.16% | 7.09% |
20 to 24 years | 1,571 | 5.54%, see rank | 6.88% | 7.04% |
25 to 34 years | 3,695 | 13.02%, see rank | 13.84% | 13.32% |
35 to 44 years | 4,246 | 14.96%, see rank | 13.49% | 13.34% |
45 to 54 years | 4,346 | 15.32%, see rank | 14.46% | 14.44% |
55 to 64 years | 2,847 | 10.03%, see rank | 11.52% | 11.84% |
65 to 74 years | 1,455 | 5.13%, see rank | 6.71% | 7.12% |
75 to 84 | 929 | 3.27%, see rank | 4.11% | 4.25% |
85 years and over | 326 | 1.15%, see rank | 1.83% | 1.78% |
ACS 2006-2010 data
Total population: 27,044
Median Age (
see rank)
O Fallon, IL | 35.20 years old |
Illinois | 36.20 years old |
U.S. | 36.90 years old |
Median Age, Male (
see rank)
O Fallon, IL | 33.80 years old |
Illinois | 34.90 years old |
U.S. | 35.60 years old |
Median Age, Female (
see rank)
O Fallon, IL | 35.90 years old |
Illinois | 37.60 years old |
U.S. | 38.10 years old |
| O Fallon, IL | % of the Total Population | Illinois | U.S. |
Under 5 years | 2,112 | 7.81%, see rank | 6.63% | 6.62% |
5 to 9 years | 2,173 | 8.04%, see rank | 6.78% | 6.62% |
10 to 14 years | 2,036 | 7.53%, see rank | 6.94% | 6.79% |
15 to 19 years | 2,286 | 8.45%, see rank | 7.31% | 7.28% |
20 to 24 years | 1,405 | 5.20%, see rank | 6.86% | 6.98% |
25 to 34 years | 3,437 | 12.71%, see rank | 13.78% | 13.22% |
35 to 44 years | 4,317 | 15.96%, see rank | 13.96% | 13.89% |
45 to 54 years | 3,981 | 14.72%, see rank | 14.55% | 14.57% |
55 to 64 years | 2,876 | 10.63%, see rank | 10.89% | 11.28% |
65 to 74 years | 1,232 | 4.56%, see rank | 6.36% | 6.74% |
75 to 84 | 849 | 3.14%, see rank | 4.17% | 4.30% |
85 years and over | 340 | 1.26%, see rank | 1.77% | 1.70% |
ACS 2005-2009 data
Total population: 26,710
Median Age (
see rank)
O Fallon, IL | 35.40 years old |
Illinois | 35.90 years old |
U.S. | 36.50 years old |
Median Age, Male (
see rank)
O Fallon, IL | 33.60 years old |
Illinois | 34.60 years old |
U.S. | 35.20 years old |
Median Age, Female (
see rank)
O Fallon, IL | 36.60 years old |
Illinois | 37.20 years old |
U.S. | 37.90 years old |
| O Fallon, IL | % of the Total Population | Illinois | U.S. |
Under 5 years | 2,083 | 7.80%, see rank | 6.97% | 6.92% |
5 to 9 years | 1,946 | 7.29%, see rank | 6.76% | 6.59% |
10 to 14 years | 1,849 | 6.92%, see rank | 6.96% | 6.83% |
15 to 19 years | 2,247 | 8.41%, see rank | 7.24% | 7.15% |
20 to 24 years | 1,481 | 5.54%, see rank | 7.08% | 7.02% |
25 to 34 years | 3,560 | 13.33%, see rank | 13.73% | 13.42% |
35 to 44 years | 4,383 | 16.41%, see rank | 14.23% | 14.18% |
45 to 54 years | 4,017 | 15.04%, see rank | 14.47% | 14.48% |
55 to 64 years | 2,822 | 10.57%, see rank | 10.43% | 10.81% |
65 to 74 years | 1,192 | 4.46%, see rank | 6.21% | 6.50% |
75 to 84 | 867 | 3.25%, see rank | 4.17% | 4.40% |
85 years and over | 263 | 0.98%, see rank | 1.74% | 1.71% |
US Census 2000 data
Total population: 21,910
Median Age (
see rank)
O Fallon, IL | 35.30 years old |
Illinois | 34.70 years old |
U.S. | 35.30 years old |
Median Age, Male (
see rank)
O Fallon, IL | 34.20 years old |
Illinois | 33.30 years old |
U.S. | 34.00 years old |
Median Age, Female (
see rank)
O Fallon, IL | 36.20 years old |
Illinois | 36.00 years old |
U.S. | 36.50 years old |
| O Fallon, IL | % of the Total Population | Illinois | U.S. |
Under 5 years | 1,442 | 6.58%, see rank | 7.06% | 6.81% |
5 to 9 years | 1,660 | 7.58%, see rank | 7.49% | 7.30% |
10 to 14 years | 1,855 | 8.47%, see rank | 7.29% | 7.29% |
15 to 19 years | 1,823 | 8.32%, see rank | 7.20% | 7.18% |
20 to 24 years | 1,173 | 5.35%, see rank | 6.85% | 6.74% |
25 to 34 years | 2,899 | 13.23%, see rank | 14.59% | 14.18% |
35 to 44 years | 4,146 | 18.92%, see rank | 15.97% | 16.04% |
45 to 54 years | 3,395 | 15.50%, see rank | 13.10% | 13.39% |
55 to 64 years | 1,576 | 7.19%, see rank | 8.38% | 8.63% |
65 to 74 years | 1,102 | 5.03%, see rank | 6.22% | 6.54% |
75 to 84 | 650 | 2.97%, see rank | 4.31% | 4.39% |
85 years and over | 189 | 0.86%, 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.