Ada County Historical Household and Family Data
ACS 2010-2014 data
Total population: 409,239
| Ada County | Idaho | U.S. | |
| Total Households | 154,408, 100% | 585,259 | 116,211,092 |
| Average Household Size | 2.60, see rank | 2.68 | 2.63 |
| 1 Person Households | 38,866, 25.17%, see rank | 24.37% | 27.57% |
| 2 or More Person Households | 115,542, 74.83%, see rank | 75.63% | 72.43% |
| Family Households (Families) | 104,286, 67.54%, see rank | 69.49% | 66.22% |
| Average Family Size | 3.21, see rank | 3.29 | 3.32 |
| Married-Couple Family | 82,272, 53.28%, see rank | 55.52% | 48.42% |
| Nonfamily Households | 50,122, 32.46%, see rank | 30.51% | 33.78% |
US Census 2010 data
Total population: 392,365
| Ada County | Idaho | U.S. | |
| Total Households | 148,445, 100% | 579,408 | 116,716,292 |
| Average Household Size | 2.58, see rank | 2.66 | 2.58 |
| 1 Person Households | 37,175, 25.04%, see rank | 23.78% | 26.74% |
| 2 or More Person Households | 111,270, 74.96%, see rank | 76.22% | 73.26% |
| Family Households (Families) | 99,282, 66.88%, see rank | 69.58% | 66.43% |
| Average Family Size | 3.11, see rank | 3.16 | 3.14 |
| Married-Couple Family | 77,808, 52.42%, see rank | 55.30% | 48.42% |
| Nonfamily Households | 49,163, 33.12%, see rank | 30.42% | 33.57% |
ACS 2008-2012 data
Total population: 394,961
| Ada County | Idaho | U.S. | |
| Total Households | 149,884, 100% | 577,648 | 115,226,802 |
| Average Household Size | 2.58, see rank | 2.66 | 2.61 |
| 1 Person Households | 37,081, 24.74%, see rank | 23.81% | 27.45% |
| 2 or More Person Households | 112,803, 75.26%, see rank | 76.19% | 72.55% |
| Family Households (Families) | 101,648, 67.82%, see rank | 69.95% | 66.47% |
| Average Family Size | 3.17, see rank | 3.24 | 3.29 |
| Married-Couple Family | 80,707, 53.85%, see rank | 56.14% | 48.97% |
| Nonfamily Households | 48,236, 32.18%, see rank | 30.05% | 33.53% |
ACS 2006-2010 data
Total population: 380,718
| Ada County | Idaho | U.S. | |
| Total Households | 145,584, 100% | 570,283 | 114,235,996 |
| Average Household Size | 2.55, see rank | 2.63 | 2.59 |
| 1 Person Households | 36,485, 25.06%, see rank | 23.64% | 27.24% |
| 2 or More Person Households | 109,099, 74.94%, see rank | 76.36% | 72.76% |
| Family Households (Families) | 97,586, 67.03%, see rank | 70.11% | 66.75% |
| Average Family Size | 3.15, see rank | 3.19 | 3.25 |
| Married-Couple Family | 78,633, 54.01%, see rank | 56.85% | 49.60% |
| Nonfamily Households | 47,998, 32.97%, see rank | 29.89% | 33.25% |
ACS 2005-2009 data
Total population: 368,791
| Ada County | Idaho | U.S. | |
| Total Households | 141,719, 100% | 552,726 | 112,611,029 |
| Average Household Size | 2.54, see rank | 2.64 | 2.60 |
| 1 Person Households | 34,908, 24.63%, see rank | 23.42% | 27.32% |
| 2 or More Person Households | 106,811, 75.37%, see rank | 76.58% | 72.68% |
| Family Households (Families) | 95,446, 67.35%, see rank | 70.28% | 66.67% |
| Average Family Size | 3.12, see rank | 3.20 | 3.27 |
| Married-Couple Family | 77,218, 54.49%, see rank | 57.01% | 49.71% |
| Nonfamily Households | 46,273, 32.65%, see rank | 29.72% | 33.33% |
US Census 2000 data
Total population: 300,904
| Ada County | Idaho | U.S. | |
| Total Households | 113,408, 100% | 469,645 | 105,480,101 |
| Average Household Size | 2.59, see rank | 2.69 | 2.59 |
| 1 Person Households | 26,951, 23.76%, see rank | 22.39% | 25.82% |
| 2 or More Person Households | 86,457, 76.24%, see rank | 77.61% | 74.18% |
| Family Households (Families) | 77,361, 68.21%, see rank | 71.46% | 68.06% |
| Average Family Size | 3.11, see rank | 3.17 | 3.14 |
| Married-Couple Family | 62,514, 55.12%, see rank | 58.88% | 51.66% |
| Nonfamily Households | 36,047, 31.79%, see rank | 28.54% | 31.94% |
* 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.