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Yellowstone County Historical Household and Family Data
ACS 2010-2014 data
Total population: 151,965
| Yellowstone County | Montana | U.S. | |
| Total Households | 61,385, 100% | 407,797 | 116,211,092 |
| Average Household Size | 2.42, see rank | 2.40 | 2.63 |
| 1 Person Households | 18,615, 30.32%, see rank | 30.21% | 27.57% |
| 2 or More Person Households | 42,770, 69.68%, see rank | 69.79% | 72.43% |
| Family Households (Families) | 38,402, 62.56%, see rank | 62.78% | 66.22% |
| Average Family Size | 3.10, see rank | 3.06 | 3.32 |
| Married-Couple Family | 29,173, 47.52%, see rank | 49.61% | 48.42% |
| Nonfamily Households | 22,983, 37.44%, see rank | 37.22% | 33.78% |
US Census 2010 data
Total population: 147,972
| Yellowstone County | Montana | U.S. | |
| Total Households | 60,672, 100% | 409,607 | 116,716,292 |
| Average Household Size | 2.38, see rank | 2.35 | 2.58 |
| 1 Person Households | 18,018, 29.70%, see rank | 29.73% | 26.74% |
| 2 or More Person Households | 42,654, 70.30%, see rank | 70.27% | 73.26% |
| Family Households (Families) | 38,367, 63.24%, see rank | 62.76% | 66.43% |
| Average Family Size | 2.94, see rank | 2.91 | 3.14 |
| Married-Couple Family | 29,124, 48.00%, see rank | 49.22% | 48.42% |
| Nonfamily Households | 22,305, 36.76%, see rank | 37.24% | 33.57% |
ACS 2008-2012 data
Total population: 148,191
| Yellowstone County | Montana | U.S. | |
| Total Households | 60,706, 100% | 405,508 | 115,226,802 |
| Average Household Size | 2.39, see rank | 2.37 | 2.61 |
| 1 Person Households | 17,911, 29.50%, see rank | 29.85% | 27.45% |
| 2 or More Person Households | 42,795, 70.50%, see rank | 70.15% | 72.55% |
| Family Households (Families) | 38,300, 63.09%, see rank | 63.19% | 66.47% |
| Average Family Size | 3.04, see rank | 3.02 | 3.29 |
| Married-Couple Family | 29,231, 48.15%, see rank | 50.48% | 48.97% |
| Nonfamily Households | 22,406, 36.91%, see rank | 36.81% | 33.53% |
ACS 2006-2010 data
Total population: 144,050
| Yellowstone County | Montana | U.S. | |
| Total Households | 59,746, 100% | 401,328 | 114,235,996 |
| Average Household Size | 2.35, see rank | 2.36 | 2.59 |
| 1 Person Households | 17,159, 28.72%, see rank | 29.10% | 27.24% |
| 2 or More Person Households | 42,587, 71.28%, see rank | 70.90% | 72.76% |
| Family Households (Families) | 38,047, 63.68%, see rank | 63.82% | 66.75% |
| Average Family Size | 2.99, see rank | 2.98 | 3.25 |
| Married-Couple Family | 30,339, 50.78%, see rank | 51.61% | 49.60% |
| Nonfamily Households | 21,699, 36.32%, see rank | 36.18% | 33.25% |
ACS 2005-2009 data
Total population: 140,436
| Yellowstone County | Montana | U.S. | |
| Total Households | 56,065, 100% | 372,947 | 112,611,029 |
| Average Household Size | 2.45, see rank | 2.49 | 2.60 |
| 1 Person Households | 16,648, 29.69%, see rank | 29.45% | 27.32% |
| 2 or More Person Households | 39,417, 70.31%, see rank | 70.55% | 72.68% |
| Family Households (Families) | 35,300, 62.96%, see rank | 63.66% | 66.67% |
| Average Family Size | 3.14, see rank | 3.15 | 3.27 |
| Married-Couple Family | 28,203, 50.30%, see rank | 51.55% | 49.71% |
| Nonfamily Households | 20,765, 37.04%, see rank | 36.34% | 33.33% |
US Census 2000 data
Total population: 129,352
| Yellowstone County | Montana | U.S. | |
| Total Households | 52,084, 100% | 358,667 | 105,480,101 |
| Average Household Size | 2.43, see rank | 2.45 | 2.59 |
| 1 Person Households | 14,553, 27.94%, see rank | 27.44% | 25.82% |
| 2 or More Person Households | 37,531, 72.06%, see rank | 72.56% | 74.18% |
| Family Households (Families) | 34,219, 65.70%, see rank | 66.19% | 68.06% |
| Average Family Size | 2.98, see rank | 2.99 | 3.14 |
| Married-Couple Family | 26,989, 51.82%, see rank | 53.55% | 51.66% |
| Nonfamily Households | 17,865, 34.30%, see rank | 33.81% | 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.