Washington County Historical Household and Family Data
ACS 2010-2014 data
Total population: 547,451
| Washington County | Oregon | U.S. | |
| Total Households | 203,901, 100% | 1,522,988 | 116,211,092 |
| Average Household Size | 2.65, see rank | 2.50 | 2.63 |
| 1 Person Households | 51,414, 25.22%, see rank | 27.93% | 27.57% |
| 2 or More Person Households | 152,487, 74.78%, see rank | 72.07% | 72.43% |
| Family Households (Families) | 137,564, 67.47%, see rank | 63.44% | 66.22% |
| Average Family Size | 3.29, see rank | 3.17 | 3.32 |
| Married-Couple Family | 108,079, 53.01%, see rank | 48.31% | 48.42% |
| Nonfamily Households | 66,337, 32.53%, see rank | 36.56% | 33.78% |
US Census 2010 data
Total population: 529,710
| Washington County | Oregon | U.S. | |
| Total Households | 200,934, 100% | 1,518,938 | 116,716,292 |
| Average Household Size | 2.60, see rank | 2.47 | 2.58 |
| 1 Person Households | 50,426, 25.10%, see rank | 27.44% | 26.74% |
| 2 or More Person Households | 150,508, 74.90%, see rank | 72.56% | 73.26% |
| Family Households (Families) | 134,323, 66.85%, see rank | 63.43% | 66.43% |
| Average Family Size | 3.14, see rank | 3.00 | 3.14 |
| Married-Couple Family | 104,912, 52.21%, see rank | 48.31% | 48.42% |
| Nonfamily Households | 66,611, 33.15%, see rank | 36.57% | 33.57% |
ACS 2008-2012 data
Total population: 531,818
| Washington County | Oregon | U.S. | |
| Total Households | 200,160, 100% | 1,512,718 | 115,226,802 |
| Average Household Size | 2.63, see rank | 2.48 | 2.61 |
| 1 Person Households | 50,308, 25.13%, see rank | 27.87% | 27.45% |
| 2 or More Person Households | 149,852, 74.87%, see rank | 72.13% | 72.55% |
| Family Households (Families) | 134,176, 67.03%, see rank | 63.74% | 66.47% |
| Average Family Size | 3.26, see rank | 3.13 | 3.29 |
| Married-Couple Family | 106,035, 52.98%, see rank | 49.03% | 48.97% |
| Nonfamily Households | 65,984, 32.97%, see rank | 36.26% | 33.53% |
ACS 2006-2010 data
Total population: 516,665
| Washington County | Oregon | U.S. | |
| Total Households | 196,438, 100% | 1,499,267 | 114,235,996 |
| Average Household Size | 2.60, see rank | 2.45 | 2.59 |
| 1 Person Households | 50,405, 25.66%, see rank | 27.87% | 27.24% |
| 2 or More Person Households | 146,033, 74.34%, see rank | 72.13% | 72.76% |
| Family Households (Families) | 130,272, 66.32%, see rank | 63.84% | 66.75% |
| Average Family Size | 3.25, see rank | 3.10 | 3.25 |
| Married-Couple Family | 102,976, 52.42%, see rank | 49.59% | 49.60% |
| Nonfamily Households | 66,166, 33.68%, see rank | 36.16% | 33.25% |
ACS 2005-2009 data
Total population: 518,002
| Washington County | Oregon | U.S. | |
| Total Households | 191,390, 100% | 1,464,196 | 112,611,029 |
| Average Household Size | 2.68, see rank | 2.49 | 2.60 |
| 1 Person Households | 48,641, 25.41%, see rank | 27.88% | 27.32% |
| 2 or More Person Households | 142,749, 74.59%, see rank | 72.12% | 72.68% |
| Family Households (Families) | 127,171, 66.45%, see rank | 63.92% | 66.67% |
| Average Family Size | 3.33, see rank | 3.15 | 3.27 |
| Married-Couple Family | 101,154, 52.85%, see rank | 49.96% | 49.71% |
| Nonfamily Households | 64,219, 33.55%, see rank | 36.08% | 33.33% |
US Census 2000 data
Total population: 445,342
| Washington County | Oregon | U.S. | |
| Total Households | 169,162, 100% | 1,333,723 | 105,480,101 |
| Average Household Size | 2.61, see rank | 2.51 | 2.59 |
| 1 Person Households | 41,741, 24.68%, see rank | 26.06% | 25.82% |
| 2 or More Person Households | 127,421, 75.32%, see rank | 73.94% | 74.18% |
| Family Households (Families) | 114,074, 67.43%, see rank | 65.81% | 68.06% |
| Average Family Size | 3.14, see rank | 3.02 | 3.14 |
| Married-Couple Family | 92,254, 54.54%, see rank | 51.92% | 51.66% |
| Nonfamily Households | 55,088, 32.57%, see rank | 34.19% | 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.