Ada County Historical Age Data
ACS 2010-2014 data
Total population: 409,239
Median Age (
see rank)
| Ada County | 35.50 years old |
| Idaho | 35.20 years old |
| U.S. | 37.40 years old |
Median Age, Male (
see rank)
| Ada County | 34.70 years old |
| Idaho | 34.40 years old |
| U.S. | 36.10 years old |
Median Age, Female (
see rank)
| Ada County | 36.20 years old |
| Idaho | 36.00 years old |
| U.S. | 38.80 years old |
| | Ada County | % of the Total Population | Idaho | U.S. |
| Under 5 years | 27,143 | 6.63%, see rank | 7.27% | 6.36% |
| 5 to 9 years | 30,057 | 7.34%, see rank | 7.53% | 6.51% |
| 10 to 14 years | 30,856 | 7.54%, see rank | 7.64% | 6.59% |
| 15 to 19 years | 27,102 | 6.62%, see rank | 7.12% | 6.85% |
| 20 to 24 years | 26,709 | 6.53%, see rank | 6.95% | 7.13% |
| 25 to 34 years | 60,037 | 14.67%, see rank | 13.25% | 13.47% |
| 35 to 44 years | 57,549 | 14.06%, see rank | 12.21% | 12.96% |
| 45 to 54 years | 55,502 | 13.56%, see rank | 12.71% | 14.09% |
| 55 to 64 years | 47,182 | 11.53%, see rank | 11.98% | 12.29% |
| 65 to 74 years | 27,416 | 6.70%, see rank | 7.76% | 7.64% |
| 75 to 84 | 13,458 | 3.29%, see rank | 3.98% | 4.25% |
| 85 years and over | 6,228 | 1.52%, see rank | 1.60% | 1.85% |
US Census 2010 data
Total population: 392,365
Median Age (
see rank)
| Ada County | 34.80 years old |
| Idaho | 34.60 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Ada County | 34.10 years old |
| Idaho | 33.70 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Ada County | 35.60 years old |
| Idaho | 35.40 years old |
| U.S. | 38.50 years old |
| | Ada County | % of the Total Population | Idaho | U.S. |
| Under 5 years | 28,357 | 7.23%, see rank | 7.77% | 6.54% |
| 5 to 9 years | 30,064 | 7.66%, see rank | 7.73% | 6.59% |
| 10 to 14 years | 28,846 | 7.35%, see rank | 7.46% | 6.70% |
| 15 to 19 years | 26,503 | 6.75%, see rank | 7.36% | 7.14% |
| 20 to 24 years | 25,712 | 6.55%, see rank | 6.90% | 6.99% |
| 25 to 34 years | 57,613 | 14.68%, see rank | 13.33% | 13.30% |
| 35 to 44 years | 55,825 | 14.23%, see rank | 12.22% | 13.30% |
| 45 to 54 years | 55,081 | 14.04%, see rank | 13.30% | 14.58% |
| 55 to 64 years | 43,316 | 11.04%, see rank | 11.50% | 11.82% |
| 65 to 74 years | 22,789 | 5.81%, see rank | 6.99% | 7.03% |
| 75 to 84 | 12,414 | 3.16%, see rank | 3.82% | 4.23% |
| 85 years and over | 5,845 | 1.49%, see rank | 1.61% | 1.78% |
ACS 2008-2012 data
Total population: 394,961
Median Age (
see rank)
| Ada County | 34.90 years old |
| Idaho | 34.70 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Ada County | 34.00 years old |
| Idaho | 33.80 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Ada County | 35.70 years old |
| Idaho | 35.50 years old |
| U.S. | 38.50 years old |
| | Ada County | % of the Total Population | Idaho | U.S. |
| Under 5 years | 28,010 | 7.09%, see rank | 7.63% | 6.51% |
| 5 to 9 years | 29,557 | 7.48%, see rank | 7.59% | 6.57% |
| 10 to 14 years | 29,442 | 7.45%, see rank | 7.52% | 6.68% |
| 15 to 19 years | 26,307 | 6.66%, see rank | 7.34% | 7.09% |
| 20 to 24 years | 26,301 | 6.66%, see rank | 7.03% | 7.04% |
| 25 to 34 years | 58,447 | 14.80%, see rank | 13.30% | 13.32% |
| 35 to 44 years | 56,253 | 14.24%, see rank | 12.28% | 13.34% |
| 45 to 54 years | 55,140 | 13.96%, see rank | 13.21% | 14.44% |
| 55 to 64 years | 43,734 | 11.07%, see rank | 11.57% | 11.84% |
| 65 to 74 years | 23,283 | 5.90%, see rank | 7.09% | 7.12% |
| 75 to 84 | 12,482 | 3.16%, see rank | 3.88% | 4.25% |
| 85 years and over | 6,005 | 1.52%, see rank | 1.57% | 1.78% |
ACS 2006-2010 data
Total population: 380,718
Median Age (
see rank)
| Ada County | 34.40 years old |
| Idaho | 34.40 years old |
| U.S. | 36.90 years old |
Median Age, Male (
see rank)
| Ada County | 33.70 years old |
| Idaho | 33.50 years old |
| U.S. | 35.60 years old |
Median Age, Female (
see rank)
| Ada County | 35.30 years old |
| Idaho | 35.30 years old |
| U.S. | 38.10 years old |
| | Ada County | % of the Total Population | Idaho | U.S. |
| Under 5 years | 28,420 | 7.46%, see rank | 7.80% | 6.62% |
| 5 to 9 years | 28,477 | 7.48%, see rank | 7.58% | 6.62% |
| 10 to 14 years | 28,261 | 7.42%, see rank | 7.51% | 6.79% |
| 15 to 19 years | 26,009 | 6.83%, see rank | 7.58% | 7.28% |
| 20 to 24 years | 25,480 | 6.69%, see rank | 7.13% | 6.98% |
| 25 to 34 years | 56,792 | 14.92%, see rank | 13.18% | 13.22% |
| 35 to 44 years | 55,855 | 14.67%, see rank | 12.62% | 13.89% |
| 45 to 54 years | 53,817 | 14.14%, see rank | 13.58% | 14.57% |
| 55 to 64 years | 39,732 | 10.44%, see rank | 11.02% | 11.28% |
| 65 to 74 years | 20,330 | 5.34%, see rank | 6.60% | 6.74% |
| 75 to 84 | 11,949 | 3.14%, see rank | 3.85% | 4.30% |
| 85 years and over | 5,596 | 1.47%, see rank | 1.54% | 1.70% |
ACS 2005-2009 data
Total population: 368,791
Median Age (
see rank)
| Ada County | 33.90 years old |
| Idaho | 34.00 years old |
| U.S. | 36.50 years old |
Median Age, Male (
see rank)
| Ada County | 33.40 years old |
| Idaho | 33.20 years old |
| U.S. | 35.20 years old |
Median Age, Female (
see rank)
| Ada County | 34.50 years old |
| Idaho | 34.90 years old |
| U.S. | 37.90 years old |
| | Ada County | % of the Total Population | Idaho | U.S. |
| Under 5 years | 28,188 | 7.64%, see rank | 7.96% | 6.92% |
| 5 to 9 years | 26,601 | 7.21%, see rank | 7.32% | 6.59% |
| 10 to 14 years | 26,236 | 7.11%, see rank | 7.43% | 6.83% |
| 15 to 19 years | 24,156 | 6.55%, see rank | 7.66% | 7.15% |
| 20 to 24 years | 24,644 | 6.68%, see rank | 7.55% | 7.02% |
| 25 to 34 years | 60,424 | 16.38%, see rank | 13.33% | 13.42% |
| 35 to 44 years | 54,563 | 14.80%, see rank | 12.81% | 14.18% |
| 45 to 54 years | 51,570 | 13.98%, see rank | 13.56% | 14.48% |
| 55 to 64 years | 36,561 | 9.91%, see rank | 10.64% | 10.81% |
| 65 to 74 years | 18,789 | 5.09%, see rank | 6.26% | 6.50% |
| 75 to 84 | 11,724 | 3.18%, see rank | 3.91% | 4.40% |
| 85 years and over | 5,335 | 1.45%, see rank | 1.57% | 1.71% |
US Census 2000 data
Total population: 300,904
Median Age (
see rank)
| Ada County | 32.80 years old |
| Idaho | 33.20 years old |
| U.S. | 35.30 years old |
Median Age, Male (
see rank)
| Ada County | 32.00 years old |
| Idaho | 32.20 years old |
| U.S. | 34.00 years old |
Median Age, Female (
see rank)
| Ada County | 33.60 years old |
| Idaho | 34.20 years old |
| U.S. | 36.50 years old |
| | Ada County | % of the Total Population | Idaho | U.S. |
| Under 5 years | 23,042 | 7.66%, see rank | 7.55% | 6.81% |
| 5 to 9 years | 22,873 | 7.60%, see rank | 7.79% | 7.30% |
| 10 to 14 years | 22,551 | 7.49%, see rank | 8.08% | 7.29% |
| 15 to 19 years | 22,237 | 7.39%, see rank | 8.57% | 7.18% |
| 20 to 24 years | 22,254 | 7.40%, see rank | 7.26% | 6.74% |
| 25 to 34 years | 47,810 | 15.89%, see rank | 13.09% | 14.18% |
| 35 to 44 years | 50,119 | 16.66%, see rank | 14.91% | 16.04% |
| 45 to 54 years | 41,059 | 13.65%, see rank | 13.16% | 13.39% |
| 55 to 64 years | 21,658 | 7.20%, see rank | 8.31% | 8.63% |
| 65 to 74 years | 13,813 | 4.59%, see rank | 5.87% | 6.54% |
| 75 to 84 | 10,020 | 3.33%, see rank | 4.01% | 4.39% |
| 85 years and over | 3,468 | 1.15%, see rank | 1.40% | 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.
