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Rock Island, WA Historical Household and Family Data
ACS 2010-2014 data
Total population: 874
| Rock Island, WA | Washington | U.S. | |
| Total Households | 306, 100% | 2,645,396 | 116,211,092 |
| Average Household Size | 2.86, see rank | 2.55 | 2.63 |
| 1 Person Households | 54, 17.65%, see rank | 27.79% | 27.57% |
| 2 or More Person Households | 252, 82.35%, see rank | 72.21% | 72.43% |
| Family Households (Families) | 220, 71.90%, see rank | 64.48% | 66.22% |
| Average Family Size | 3.35, see rank | 3.23 | 3.32 |
| Married-Couple Family | 170, 55.56%, see rank | 49.73% | 48.42% |
| Nonfamily Households | 86, 28.10%, see rank | 35.52% | 33.78% |
US Census 2010 data
Total population: 788
| Rock Island, WA | Washington | U.S. | |
| Total Households | 262, 100% | 2,620,076 | 116,716,292 |
| Average Household Size | 3.01, see rank | 2.51 | 2.58 |
| 1 Person Households | 69, 26.34%, see rank | 27.16% | 26.74% |
| 2 or More Person Households | 193, 73.66%, see rank | 72.84% | 73.26% |
| Family Households (Families) | 179, 68.32%, see rank | 64.40% | 66.43% |
| Average Family Size | 3.66, see rank | 3.06 | 3.14 |
| Married-Couple Family | 134, 51.15%, see rank | 49.19% | 48.42% |
| Nonfamily Households | 83, 31.68%, see rank | 35.60% | 33.57% |
ACS 2008-2012 data
Total population: 689
| Rock Island, WA | Washington | U.S. | |
| Total Households | 285, 100% | 2,619,995 | 115,226,802 |
| Average Household Size | 2.42, see rank | 2.52 | 2.61 |
| 1 Person Households | 81, 28.42%, see rank | 27.74% | 27.45% |
| 2 or More Person Households | 204, 71.58%, see rank | 72.26% | 72.55% |
| Family Households (Families) | 183, 64.21%, see rank | 64.49% | 66.47% |
| Average Family Size | 3.09, see rank | 3.18 | 3.29 |
| Married-Couple Family | 124, 43.51%, see rank | 49.98% | 48.97% |
| Nonfamily Households | 102, 35.79%, see rank | 35.51% | 33.53% |
ACS 2006-2010 data
Total population: 806
| Rock Island, WA | Washington | U.S. | |
| Total Households | 310, 100% | 2,577,375 | 114,235,996 |
| Average Household Size | 2.60, see rank | 2.49 | 2.59 |
| 1 Person Households | 88, 28.39%, see rank | 27.74% | 27.24% |
| 2 or More Person Households | 222, 71.61%, see rank | 72.26% | 72.76% |
| Family Households (Families) | 209, 67.42%, see rank | 64.62% | 66.75% |
| Average Family Size | 3.32, see rank | 3.14 | 3.25 |
| Married-Couple Family | 123, 39.68%, see rank | 50.17% | 49.60% |
| Nonfamily Households | 101, 32.58%, see rank | 35.38% | 33.25% |
ACS 2005-2009 data
Total population: 844
| Rock Island, WA | Washington | U.S. | |
| Total Households | 293, 100% | 2,512,327 | 112,611,029 |
| Average Household Size | 2.88, see rank | 2.52 | 2.60 |
| 1 Person Households | 82, 27.99%, see rank | 27.81% | 27.32% |
| 2 or More Person Households | 211, 72.01%, see rank | 72.19% | 72.68% |
| Family Households (Families) | 197, 67.24%, see rank | 64.50% | 66.67% |
| Average Family Size | 3.72, see rank | 3.18 | 3.27 |
| Married-Couple Family | 101, 34.47%, see rank | 50.27% | 49.71% |
| Nonfamily Households | 96, 32.76%, see rank | 35.50% | 33.33% |
US Census 2000 data
Total population: 863
| Rock Island, WA | Washington | U.S. | |
| Total Households | 270, 100% | 2,271,398 | 105,480,101 |
| Average Household Size | 3.20, see rank | 2.53 | 2.59 |
| 1 Person Households | 50, 18.52%, see rank | 26.17% | 25.82% |
| 2 or More Person Households | 220, 81.48%, see rank | 73.83% | 74.18% |
| Family Households (Families) | 204, 75.56%, see rank | 66.00% | 68.06% |
| Average Family Size | 3.66, see rank | 3.07 | 3.14 |
| Married-Couple Family | 160, 59.26%, see rank | 52.04% | 51.66% |
| Nonfamily Households | 66, 24.44%, 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.