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Keystone, SD Historical Household and Family Data
ACS 2010-2014 data
Total population: 365
| Keystone, SD | South Dakota | U.S. | |
| Total Households | 155, 100% | 327,101 | 116,211,092 |
| Average Household Size | 2.26, see rank | 2.45 | 2.63 |
| 1 Person Households | 55, 35.48%, see rank | 29.47% | 27.57% |
| 2 or More Person Households | 100, 64.52%, see rank | 70.53% | 72.43% |
| Family Households (Families) | 75, 48.39%, see rank | 64.44% | 66.22% |
| Average Family Size | 2.93, see rank | 3.11 | 3.32 |
| Married-Couple Family | 61, 39.35%, see rank | 50.30% | 48.42% |
| Nonfamily Households | 80, 51.61%, see rank | 35.56% | 33.78% |
US Census 2010 data
Total population: 337
| Keystone, SD | South Dakota | U.S. | |
| Total Households | 153, 100% | 322,282 | 116,716,292 |
| Average Household Size | 2.20, see rank | 2.42 | 2.58 |
| 1 Person Households | 52, 33.99%, see rank | 29.36% | 26.74% |
| 2 or More Person Households | 101, 66.01%, see rank | 70.64% | 73.26% |
| Family Households (Families) | 81, 52.94%, see rank | 64.22% | 66.43% |
| Average Family Size | 2.83, see rank | 3.00 | 3.14 |
| Married-Couple Family | 60, 39.22%, see rank | 50.15% | 48.42% |
| Nonfamily Households | 72, 47.06%, see rank | 35.78% | 33.57% |
ACS 2008-2012 data
Total population: 397
| Keystone, SD | South Dakota | U.S. | |
| Total Households | 171, 100% | 320,467 | 115,226,802 |
| Average Household Size | 2.27, see rank | 2.44 | 2.61 |
| 1 Person Households | 56, 32.75%, see rank | 29.39% | 27.45% |
| 2 or More Person Households | 115, 67.25%, see rank | 70.61% | 72.55% |
| Family Households (Families) | 96, 56.14%, see rank | 64.82% | 66.47% |
| Average Family Size | 2.85, see rank | 3.10 | 3.29 |
| Married-Couple Family | 77, 45.03%, see rank | 50.99% | 48.97% |
| Nonfamily Households | 75, 43.86%, see rank | 35.18% | 33.53% |
ACS 2006-2010 data
Total population: 328
| Keystone, SD | South Dakota | U.S. | |
| Total Households | 152, 100% | 315,468 | 114,235,996 |
| Average Household Size | 2.16, see rank | 2.43 | 2.59 |
| 1 Person Households | 56, 36.84%, see rank | 29.03% | 27.24% |
| 2 or More Person Households | 96, 63.16%, see rank | 70.97% | 72.76% |
| Family Households (Families) | 87, 57.24%, see rank | 65.26% | 66.75% |
| Average Family Size | 2.91, see rank | 3.07 | 3.25 |
| Married-Couple Family | 69, 45.39%, see rank | 51.99% | 49.60% |
| Nonfamily Households | 65, 42.76%, see rank | 34.74% | 33.25% |
ACS 2005-2009 data
Total population: 362
| Keystone, SD | South Dakota | U.S. | |
| Total Households | 154, 100% | 314,674 | 112,611,029 |
| Average Household Size | 2.35, see rank | 2.43 | 2.60 |
| 1 Person Households | 50, 32.47%, see rank | 29.03% | 27.32% |
| 2 or More Person Households | 104, 67.53%, see rank | 70.97% | 72.68% |
| Family Households (Families) | 99, 64.29%, see rank | 65.18% | 66.67% |
| Average Family Size | 3.04, see rank | 3.08 | 3.27 |
| Married-Couple Family | 83, 53.90%, see rank | 51.82% | 49.71% |
| Nonfamily Households | 55, 35.71%, see rank | 34.82% | 33.33% |
US Census 2000 data
Total population: 311
| Keystone, SD | South Dakota | U.S. | |
| Total Households | 152, 100% | 290,245 | 105,480,101 |
| Average Household Size | 2.05, see rank | 2.50 | 2.59 |
| 1 Person Households | 54, 35.53%, see rank | 27.58% | 25.82% |
| 2 or More Person Households | 98, 64.47%, see rank | 72.42% | 74.18% |
| Family Households (Families) | 85, 55.92%, see rank | 66.95% | 68.06% |
| Average Family Size | 2.60, see rank | 3.07 | 3.14 |
| Married-Couple Family | 57, 37.50%, see rank | 54.23% | 51.66% |
| Nonfamily Households | 67, 44.08%, see rank | 33.05% | 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.