Lake County Historical Age Data
ACS 2010-2014 data
Total population: 28,987
Median Age (
see rank)
| Lake County | 41.70 years old |
| Montana | 39.80 years old |
| U.S. | 37.40 years old |
Median Age, Male (
see rank)
| Lake County | 40.70 years old |
| Montana | 38.60 years old |
| U.S. | 36.10 years old |
Median Age, Female (
see rank)
| Lake County | 42.60 years old |
| Montana | 40.90 years old |
| U.S. | 38.80 years old |
| | Lake County | % of the Total Population | Montana | U.S. |
| Under 5 years | 1,965 | 6.78%, see rank | 6.07% | 6.36% |
| 5 to 9 years | 2,232 | 7.70%, see rank | 6.39% | 6.51% |
| 10 to 14 years | 1,733 | 5.98%, see rank | 6.00% | 6.59% |
| 15 to 19 years | 1,812 | 6.25%, see rank | 6.51% | 6.85% |
| 20 to 24 years | 1,707 | 5.89%, see rank | 7.07% | 7.13% |
| 25 to 34 years | 2,989 | 10.31%, see rank | 12.49% | 13.47% |
| 35 to 44 years | 2,988 | 10.31%, see rank | 11.27% | 12.96% |
| 45 to 54 years | 3,811 | 13.15%, see rank | 13.90% | 14.09% |
| 55 to 64 years | 4,444 | 15.33%, see rank | 14.59% | 12.29% |
| 65 to 74 years | 3,156 | 10.89%, see rank | 8.89% | 7.64% |
| 75 to 84 | 1,623 | 5.60%, see rank | 4.77% | 4.25% |
| 85 years and over | 527 | 1.82%, see rank | 2.05% | 1.85% |
US Census 2010 data
Total population: 28,746
Median Age (
see rank)
| Lake County | 41.30 years old |
| Montana | 39.80 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Lake County | 40.30 years old |
| Montana | 38.80 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Lake County | 42.30 years old |
| Montana | 41.00 years old |
| U.S. | 38.50 years old |
| | Lake County | % of the Total Population | Montana | U.S. |
| Under 5 years | 2,136 | 7.43%, see rank | 6.31% | 6.54% |
| 5 to 9 years | 1,923 | 6.69%, see rank | 6.14% | 6.59% |
| 10 to 14 years | 2,009 | 6.99%, see rank | 6.18% | 6.70% |
| 15 to 19 years | 1,961 | 6.82%, see rank | 6.74% | 7.14% |
| 20 to 24 years | 1,587 | 5.52%, see rank | 6.79% | 6.99% |
| 25 to 34 years | 2,968 | 10.32%, see rank | 12.42% | 13.30% |
| 35 to 44 years | 2,940 | 10.23%, see rank | 11.42% | 13.30% |
| 45 to 54 years | 4,156 | 14.46%, see rank | 15.14% | 14.58% |
| 55 to 64 years | 4,232 | 14.72%, see rank | 14.03% | 11.82% |
| 65 to 74 years | 2,789 | 9.70%, see rank | 8.16% | 7.03% |
| 75 to 84 | 1,514 | 5.27%, see rank | 4.65% | 4.23% |
| 85 years and over | 531 | 1.85%, see rank | 2.02% | 1.78% |
ACS 2008-2012 data
Total population: 28,794
Median Age (
see rank)
| Lake County | 41.00 years old |
| Montana | 39.90 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Lake County | 40.60 years old |
| Montana | 38.80 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Lake County | 41.30 years old |
| Montana | 41.00 years old |
| U.S. | 38.50 years old |
| | Lake County | % of the Total Population | Montana | U.S. |
| Under 5 years | 2,053 | 7.13%, see rank | 6.14% | 6.51% |
| 5 to 9 years | 1,883 | 6.54%, see rank | 6.31% | 6.57% |
| 10 to 14 years | 2,033 | 7.06%, see rank | 6.12% | 6.68% |
| 15 to 19 years | 1,944 | 6.75%, see rank | 6.76% | 7.09% |
| 20 to 24 years | 1,693 | 5.88%, see rank | 6.91% | 7.04% |
| 25 to 34 years | 2,871 | 9.97%, see rank | 12.28% | 13.32% |
| 35 to 44 years | 3,034 | 10.54%, see rank | 11.53% | 13.34% |
| 45 to 54 years | 4,073 | 14.15%, see rank | 14.91% | 14.44% |
| 55 to 64 years | 4,283 | 14.87%, see rank | 14.10% | 11.84% |
| 65 to 74 years | 2,871 | 9.97%, see rank | 8.22% | 7.12% |
| 75 to 84 | 1,539 | 5.34%, see rank | 4.74% | 4.25% |
| 85 years and over | 517 | 1.80%, see rank | 1.97% | 1.78% |
ACS 2006-2010 data
Total population: 28,493
Median Age (
see rank)
| Lake County | 40.90 years old |
| Montana | 39.70 years old |
| U.S. | 36.90 years old |
Median Age, Male (
see rank)
| Lake County | 39.90 years old |
| Montana | 38.60 years old |
| U.S. | 35.60 years old |
Median Age, Female (
see rank)
| Lake County | 42.00 years old |
| Montana | 40.90 years old |
| U.S. | 38.10 years old |
| | Lake County | % of the Total Population | Montana | U.S. |
| Under 5 years | 1,990 | 6.98%, see rank | 6.13% | 6.62% |
| 5 to 9 years | 1,791 | 6.29%, see rank | 6.20% | 6.62% |
| 10 to 14 years | 2,044 | 7.17%, see rank | 6.33% | 6.79% |
| 15 to 19 years | 2,081 | 7.30%, see rank | 7.14% | 7.28% |
| 20 to 24 years | 1,687 | 5.92%, see rank | 7.02% | 6.98% |
| 25 to 34 years | 2,795 | 9.81%, see rank | 11.87% | 13.22% |
| 35 to 44 years | 3,127 | 10.97%, see rank | 12.02% | 13.89% |
| 45 to 54 years | 4,281 | 15.02%, see rank | 15.65% | 14.57% |
| 55 to 64 years | 4,074 | 14.30%, see rank | 13.27% | 11.28% |
| 65 to 74 years | 2,591 | 9.09%, see rank | 7.69% | 6.74% |
| 75 to 84 | 1,590 | 5.58%, see rank | 4.86% | 4.30% |
| 85 years and over | 442 | 1.55%, see rank | 1.82% | 1.70% |
ACS 2005-2009 data
Total population: 28,239
Median Age (
see rank)
| Lake County | 39.70 years old |
| Montana | 39.00 years old |
| U.S. | 36.50 years old |
Median Age, Male (
see rank)
| Lake County | 38.10 years old |
| Montana | 37.70 years old |
| U.S. | 35.20 years old |
Median Age, Female (
see rank)
| Lake County | 40.70 years old |
| Montana | 40.20 years old |
| U.S. | 37.90 years old |
| | Lake County | % of the Total Population | Montana | U.S. |
| Under 5 years | 1,920 | 6.80%, see rank | 6.21% | 6.92% |
| 5 to 9 years | 1,913 | 6.77%, see rank | 6.08% | 6.59% |
| 10 to 14 years | 1,967 | 6.97%, see rank | 6.35% | 6.83% |
| 15 to 19 years | 2,145 | 7.60%, see rank | 7.34% | 7.15% |
| 20 to 24 years | 1,877 | 6.65%, see rank | 7.81% | 7.02% |
| 25 to 34 years | 2,800 | 9.92%, see rank | 11.76% | 13.42% |
| 35 to 44 years | 3,149 | 11.15%, see rank | 12.26% | 14.18% |
| 45 to 54 years | 4,260 | 15.09%, see rank | 15.63% | 14.48% |
| 55 to 64 years | 3,920 | 13.88%, see rank | 12.47% | 10.81% |
| 65 to 74 years | 2,358 | 8.35%, see rank | 7.28% | 6.50% |
| 75 to 84 | 1,576 | 5.58%, see rank | 4.90% | 4.40% |
| 85 years and over | 354 | 1.25%, see rank | 1.91% | 1.71% |
US Census 2000 data
Total population: 26,507
Median Age (
see rank)
| Lake County | 38.20 years old |
| Montana | 37.50 years old |
| U.S. | 35.30 years old |
Median Age, Male (
see rank)
| Lake County | 37.30 years old |
| Montana | 36.60 years old |
| U.S. | 34.00 years old |
Median Age, Female (
see rank)
| Lake County | 39.00 years old |
| Montana | 38.50 years old |
| U.S. | 36.50 years old |
| | Lake County | % of the Total Population | Montana | U.S. |
| Under 5 years | 1,778 | 6.71%, see rank | 6.08% | 6.81% |
| 5 to 9 years | 1,927 | 7.27%, see rank | 6.87% | 7.30% |
| 10 to 14 years | 2,265 | 8.54%, see rank | 7.68% | 7.29% |
| 15 to 19 years | 2,233 | 8.42%, see rank | 7.90% | 7.18% |
| 20 to 24 years | 1,351 | 5.10%, see rank | 6.47% | 6.74% |
| 25 to 34 years | 2,619 | 9.88%, see rank | 11.45% | 14.18% |
| 35 to 44 years | 3,874 | 14.62%, see rank | 15.73% | 16.04% |
| 45 to 54 years | 3,861 | 14.57%, see rank | 14.97% | 13.39% |
| 55 to 64 years | 2,748 | 10.37%, see rank | 9.43% | 8.63% |
| 65 to 74 years | 2,094 | 7.90%, see rank | 6.93% | 6.54% |
| 75 to 84 | 1,295 | 4.89%, see rank | 4.78% | 4.39% |
| 85 years and over | 462 | 1.74%, see rank | 1.70% | 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.
