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Columbia County Historical Household and Family Data
ACS 2010-2014 data
Total population: 4,031
| Columbia County | Washington | U.S. | |
| Total Households | 1,706, 100% | 2,645,396 | 116,211,092 |
| Average Household Size | 2.31, see rank | 2.55 | 2.63 |
| 1 Person Households | 436, 25.56%, see rank | 27.79% | 27.57% |
| 2 or More Person Households | 1,270, 74.44%, see rank | 72.21% | 72.43% |
| Family Households (Families) | 1,137, 66.65%, see rank | 64.48% | 66.22% |
| Average Family Size | 2.86, see rank | 3.23 | 3.32 |
| Married-Couple Family | 848, 49.71%, see rank | 49.73% | 48.42% |
| Nonfamily Households | 569, 33.35%, see rank | 35.52% | 33.78% |
US Census 2010 data
Total population: 4,078
| Columbia County | Washington | U.S. | |
| Total Households | 1,762, 100% | 2,620,076 | 116,716,292 |
| Average Household Size | 2.27, see rank | 2.51 | 2.58 |
| 1 Person Households | 517, 29.34%, see rank | 27.16% | 26.74% |
| 2 or More Person Households | 1,245, 70.66%, see rank | 72.84% | 73.26% |
| Family Households (Families) | 1,156, 65.61%, see rank | 64.40% | 66.43% |
| Average Family Size | 2.76, see rank | 3.06 | 3.14 |
| Married-Couple Family | 926, 52.55%, see rank | 49.19% | 48.42% |
| Nonfamily Households | 606, 34.39%, see rank | 35.60% | 33.57% |
ACS 2008-2012 data
Total population: 4,001
| Columbia County | Washington | U.S. | |
| Total Households | 1,713, 100% | 2,619,995 | 115,226,802 |
| Average Household Size | 2.29, see rank | 2.52 | 2.61 |
| 1 Person Households | 496, 28.96%, see rank | 27.74% | 27.45% |
| 2 or More Person Households | 1,217, 71.04%, see rank | 72.26% | 72.55% |
| Family Households (Families) | 1,111, 64.86%, see rank | 64.49% | 66.47% |
| Average Family Size | 2.90, see rank | 3.18 | 3.29 |
| Married-Couple Family | 924, 53.94%, see rank | 49.98% | 48.97% |
| Nonfamily Households | 602, 35.14%, see rank | 35.51% | 33.53% |
ACS 2006-2010 data
Total population: 3,957
| Columbia County | Washington | U.S. | |
| Total Households | 1,732, 100% | 2,577,375 | 114,235,996 |
| Average Household Size | 2.28, see rank | 2.49 | 2.59 |
| 1 Person Households | 487, 28.12%, see rank | 27.74% | 27.24% |
| 2 or More Person Households | 1,245, 71.88%, see rank | 72.26% | 72.76% |
| Family Households (Families) | 1,100, 63.51%, see rank | 64.62% | 66.75% |
| Average Family Size | 2.88, see rank | 3.14 | 3.25 |
| Married-Couple Family | 874, 50.46%, see rank | 50.17% | 49.60% |
| Nonfamily Households | 632, 36.49%, see rank | 35.38% | 33.25% |
ACS 2005-2009 data
Total population: 3,984
| Columbia County | Washington | U.S. | |
| Total Households | 1,788, 100% | 2,512,327 | 112,611,029 |
| Average Household Size | 2.22, see rank | 2.52 | 2.60 |
| 1 Person Households | 520, 29.08%, see rank | 27.81% | 27.32% |
| 2 or More Person Households | 1,268, 70.92%, see rank | 72.19% | 72.68% |
| Family Households (Families) | 1,136, 63.53%, see rank | 64.50% | 66.67% |
| Average Family Size | 2.81, see rank | 3.18 | 3.27 |
| Married-Couple Family | 936, 52.35%, see rank | 50.27% | 49.71% |
| Nonfamily Households | 652, 36.47%, see rank | 35.50% | 33.33% |
US Census 2000 data
Total population: 4,064
| Columbia County | Washington | U.S. | |
| Total Households | 1,687, 100% | 2,271,398 | 105,480,101 |
| Average Household Size | 2.36, see rank | 2.53 | 2.59 |
| 1 Person Households | 490, 29.05%, see rank | 26.17% | 25.82% |
| 2 or More Person Households | 1,197, 70.95%, see rank | 73.83% | 74.18% |
| Family Households (Families) | 1,139, 67.52%, see rank | 66.00% | 68.06% |
| Average Family Size | 2.89, see rank | 3.07 | 3.14 |
| Married-Couple Family | 944, 55.96%, see rank | 52.04% | 51.66% |
| Nonfamily Households | 548, 32.48%, see rank | 34.00% | 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.