Marion County Historical Age Data
ACS 2010-2014 data
Total population: 38,922
Median Age (
see rank)
| Marion County | 41.50 years old |
| Illinois | 37.00 years old |
| U.S. | 37.40 years old |
Median Age, Male (
see rank)
| Marion County | 40.30 years old |
| Illinois | 35.70 years old |
| U.S. | 36.10 years old |
Median Age, Female (
see rank)
| Marion County | 42.90 years old |
| Illinois | 38.40 years old |
| U.S. | 38.80 years old |
| | Marion County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 2,488 | 6.39%, see rank | 6.30% | 6.36% |
| 5 to 9 years | 2,606 | 6.70%, see rank | 6.58% | 6.51% |
| 10 to 14 years | 2,336 | 6.00%, see rank | 6.71% | 6.59% |
| 15 to 19 years | 2,441 | 6.27%, see rank | 6.94% | 6.85% |
| 20 to 24 years | 2,344 | 6.02%, see rank | 6.95% | 7.13% |
| 25 to 34 years | 4,406 | 11.32%, see rank | 13.84% | 13.47% |
| 35 to 44 years | 4,457 | 11.45%, see rank | 13.20% | 12.96% |
| 45 to 54 years | 5,575 | 14.32%, see rank | 14.17% | 14.09% |
| 55 to 64 years | 5,356 | 13.76%, see rank | 12.13% | 12.29% |
| 65 to 74 years | 3,663 | 9.41%, see rank | 7.18% | 7.64% |
| 75 to 84 | 2,087 | 5.36%, see rank | 4.10% | 4.25% |
| 85 years and over | 1,163 | 2.99%, see rank | 1.90% | 1.85% |
US Census 2010 data
Total population: 39,437
Median Age (
see rank)
| Marion County | 41.40 years old |
| Illinois | 36.60 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Marion County | 39.80 years old |
| Illinois | 35.20 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Marion County | 43.10 years old |
| Illinois | 37.90 years old |
| U.S. | 38.50 years old |
| | Marion County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 2,557 | 6.48%, see rank | 6.51% | 6.54% |
| 5 to 9 years | 2,376 | 6.02%, see rank | 6.70% | 6.59% |
| 10 to 14 years | 2,561 | 6.49%, see rank | 6.85% | 6.70% |
| 15 to 19 years | 2,793 | 7.08%, see rank | 7.19% | 7.14% |
| 20 to 24 years | 2,172 | 5.51%, see rank | 6.85% | 6.99% |
| 25 to 34 years | 4,353 | 11.04%, see rank | 13.84% | 13.30% |
| 35 to 44 years | 4,524 | 11.47%, see rank | 13.45% | 13.30% |
| 45 to 54 years | 5,938 | 15.06%, see rank | 14.58% | 14.58% |
| 55 to 64 years | 5,240 | 13.29%, see rank | 11.48% | 11.82% |
| 65 to 74 years | 3,593 | 9.11%, see rank | 6.62% | 7.03% |
| 75 to 84 | 2,163 | 5.48%, see rank | 4.09% | 4.23% |
| 85 years and over | 1,167 | 2.96%, see rank | 1.83% | 1.78% |
ACS 2008-2012 data
Total population: 39,319
Median Age (
see rank)
| Marion County | 41.40 years old |
| Illinois | 36.60 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Marion County | 40.20 years old |
| Illinois | 35.30 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Marion County | 43.00 years old |
| Illinois | 38.00 years old |
| U.S. | 38.50 years old |
| | Marion County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 2,538 | 6.45%, see rank | 6.50% | 6.51% |
| 5 to 9 years | 2,442 | 6.21%, see rank | 6.68% | 6.57% |
| 10 to 14 years | 2,498 | 6.35%, see rank | 6.82% | 6.68% |
| 15 to 19 years | 2,759 | 7.02%, see rank | 7.16% | 7.09% |
| 20 to 24 years | 2,203 | 5.60%, see rank | 6.88% | 7.04% |
| 25 to 34 years | 4,421 | 11.24%, see rank | 13.84% | 13.32% |
| 35 to 44 years | 4,585 | 11.66%, see rank | 13.49% | 13.34% |
| 45 to 54 years | 5,816 | 14.79%, see rank | 14.46% | 14.44% |
| 55 to 64 years | 5,224 | 13.29%, see rank | 11.52% | 11.84% |
| 65 to 74 years | 3,510 | 8.93%, see rank | 6.71% | 7.12% |
| 75 to 84 | 2,188 | 5.56%, see rank | 4.11% | 4.25% |
| 85 years and over | 1,135 | 2.89%, see rank | 1.83% | 1.78% |
ACS 2006-2010 data
Total population: 39,722
Median Age (
see rank)
| Marion County | 40.80 years old |
| Illinois | 36.20 years old |
| U.S. | 36.90 years old |
Median Age, Male (
see rank)
| Marion County | 39.30 years old |
| Illinois | 34.90 years old |
| U.S. | 35.60 years old |
Median Age, Female (
see rank)
| Marion County | 42.80 years old |
| Illinois | 37.60 years old |
| U.S. | 38.10 years old |
| | Marion County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 2,615 | 6.58%, see rank | 6.63% | 6.62% |
| 5 to 9 years | 2,438 | 6.14%, see rank | 6.78% | 6.62% |
| 10 to 14 years | 2,597 | 6.54%, see rank | 6.94% | 6.79% |
| 15 to 19 years | 2,936 | 7.39%, see rank | 7.31% | 7.28% |
| 20 to 24 years | 2,169 | 5.46%, see rank | 6.86% | 6.98% |
| 25 to 34 years | 4,428 | 11.15%, see rank | 13.78% | 13.22% |
| 35 to 44 years | 4,813 | 12.12%, see rank | 13.96% | 13.89% |
| 45 to 54 years | 5,900 | 14.85%, see rank | 14.55% | 14.57% |
| 55 to 64 years | 4,965 | 12.50%, see rank | 10.89% | 11.28% |
| 65 to 74 years | 3,447 | 8.68%, see rank | 6.36% | 6.74% |
| 75 to 84 | 2,132 | 5.37%, see rank | 4.17% | 4.30% |
| 85 years and over | 1,282 | 3.23%, see rank | 1.77% | 1.70% |
ACS 2005-2009 data
Total population: 39,488
Median Age (
see rank)
| Marion County | 41.00 years old |
| Illinois | 35.90 years old |
| U.S. | 36.50 years old |
Median Age, Male (
see rank)
| Marion County | 38.80 years old |
| Illinois | 34.60 years old |
| U.S. | 35.20 years old |
Median Age, Female (
see rank)
| Marion County | 43.20 years old |
| Illinois | 37.20 years old |
| U.S. | 37.90 years old |
| | Marion County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 2,551 | 6.46%, see rank | 6.97% | 6.92% |
| 5 to 9 years | 2,504 | 6.34%, see rank | 6.76% | 6.59% |
| 10 to 14 years | 2,517 | 6.37%, see rank | 6.96% | 6.83% |
| 15 to 19 years | 2,780 | 7.04%, see rank | 7.24% | 7.15% |
| 20 to 24 years | 2,240 | 5.67%, see rank | 7.08% | 7.02% |
| 25 to 34 years | 4,413 | 11.18%, see rank | 13.73% | 13.42% |
| 35 to 44 years | 4,883 | 12.37%, see rank | 14.23% | 14.18% |
| 45 to 54 years | 5,882 | 14.90%, see rank | 14.47% | 14.48% |
| 55 to 64 years | 4,801 | 12.16%, see rank | 10.43% | 10.81% |
| 65 to 74 years | 3,360 | 8.51%, see rank | 6.21% | 6.50% |
| 75 to 84 | 2,259 | 5.72%, see rank | 4.17% | 4.40% |
| 85 years and over | 1,298 | 3.29%, see rank | 1.74% | 1.71% |
US Census 2000 data
Total population: 41,691
Median Age (
see rank)
| Marion County | 38.40 years old |
| Illinois | 34.70 years old |
| U.S. | 35.30 years old |
Median Age, Male (
see rank)
| Marion County | 36.50 years old |
| Illinois | 33.30 years old |
| U.S. | 34.00 years old |
Median Age, Female (
see rank)
| Marion County | 40.10 years old |
| Illinois | 36.00 years old |
| U.S. | 36.50 years old |
| | Marion County | % of the Total Population | Illinois | U.S. |
| Under 5 years | 2,658 | 6.38%, see rank | 7.06% | 6.81% |
| 5 to 9 years | 2,977 | 7.14%, see rank | 7.49% | 7.30% |
| 10 to 14 years | 3,080 | 7.39%, see rank | 7.29% | 7.29% |
| 15 to 19 years | 3,014 | 7.23%, see rank | 7.20% | 7.18% |
| 20 to 24 years | 2,259 | 5.42%, see rank | 6.85% | 6.74% |
| 25 to 34 years | 4,798 | 11.51%, see rank | 14.59% | 14.18% |
| 35 to 44 years | 6,271 | 15.04%, see rank | 15.97% | 16.04% |
| 45 to 54 years | 5,528 | 13.26%, see rank | 13.10% | 13.39% |
| 55 to 64 years | 4,181 | 10.03%, see rank | 8.38% | 8.63% |
| 65 to 74 years | 3,266 | 7.83%, see rank | 6.22% | 6.54% |
| 75 to 84 | 2,549 | 6.11%, see rank | 4.31% | 4.39% |
| 85 years and over | 1,110 | 2.66%, 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.
