Jefferson County Historical Household and Family Data
ACS 2010-2014 data
Total population: 11,465
| Jefferson County | Montana | U.S. | |
| Total Households | 4,497, 100% | 407,797 | 116,211,092 |
| Average Household Size | 2.49, see rank | 2.40 | 2.63 |
| 1 Person Households | 1,008, 22.41%, see rank | 30.21% | 27.57% |
| 2 or More Person Households | 3,489, 77.59%, see rank | 69.79% | 72.43% |
| Family Households (Families) | 3,235, 71.94%, see rank | 62.78% | 66.22% |
| Average Family Size | 2.98, see rank | 3.06 | 3.32 |
| Married-Couple Family | 2,744, 61.02%, see rank | 49.61% | 48.42% |
| Nonfamily Households | 1,262, 28.06%, see rank | 37.22% | 33.78% |
US Census 2010 data
Total population: 11,406
| Jefferson County | Montana | U.S. | |
| Total Households | 4,512, 100% | 409,607 | 116,716,292 |
| Average Household Size | 2.48, see rank | 2.35 | 2.58 |
| 1 Person Households | 1,019, 22.58%, see rank | 29.73% | 26.74% |
| 2 or More Person Households | 3,493, 77.42%, see rank | 70.27% | 73.26% |
| Family Households (Families) | 3,301, 73.16%, see rank | 62.76% | 66.43% |
| Average Family Size | 2.90, see rank | 2.91 | 3.14 |
| Married-Couple Family | 2,875, 63.72%, see rank | 49.22% | 48.42% |
| Nonfamily Households | 1,211, 26.84%, see rank | 37.24% | 33.57% |
ACS 2008-2012 data
Total population: 11,360
| Jefferson County | Montana | U.S. | |
| Total Households | 4,549, 100% | 405,508 | 115,226,802 |
| Average Household Size | 2.43, see rank | 2.37 | 2.61 |
| 1 Person Households | 1,059, 23.28%, see rank | 29.85% | 27.45% |
| 2 or More Person Households | 3,490, 76.72%, see rank | 70.15% | 72.55% |
| Family Households (Families) | 3,187, 70.06%, see rank | 63.19% | 66.47% |
| Average Family Size | 2.94, see rank | 3.02 | 3.29 |
| Married-Couple Family | 2,817, 61.93%, see rank | 50.48% | 48.97% |
| Nonfamily Households | 1,362, 29.94%, see rank | 36.81% | 33.53% |
ACS 2006-2010 data
Total population: 11,166
| Jefferson County | Montana | U.S. | |
| Total Households | 4,428, 100% | 401,328 | 114,235,996 |
| Average Household Size | 2.35, see rank | 2.36 | 2.59 |
| 1 Person Households | 958, 21.64%, see rank | 29.10% | 27.24% |
| 2 or More Person Households | 3,470, 78.36%, see rank | 70.90% | 72.76% |
| Family Households (Families) | 3,163, 71.43%, see rank | 63.82% | 66.75% |
| Average Family Size | 2.79, see rank | 2.98 | 3.25 |
| Married-Couple Family | 2,810, 63.46%, see rank | 51.61% | 49.60% |
| Nonfamily Households | 1,265, 28.57%, see rank | 36.18% | 33.25% |
ACS 2005-2009 data
Total population: 11,105
| Jefferson County | Montana | U.S. | |
| Total Households | 3,657, 100% | 372,947 | 112,611,029 |
| Average Household Size | 2.88, see rank | 2.49 | 2.60 |
| 1 Person Households | 823, 22.50%, see rank | 29.45% | 27.32% |
| 2 or More Person Households | 2,834, 77.50%, see rank | 70.55% | 72.68% |
| Family Households (Families) | 2,685, 73.42%, see rank | 63.66% | 66.67% |
| Average Family Size | 3.45, see rank | 3.15 | 3.27 |
| Married-Couple Family | 2,380, 65.08%, see rank | 51.55% | 49.71% |
| Nonfamily Households | 972, 26.58%, see rank | 36.34% | 33.33% |
US Census 2000 data
Total population: 10,049
| Jefferson County | Montana | U.S. | |
| Total Households | 3,747, 100% | 358,667 | 105,480,101 |
| Average Household Size | 2.62, see rank | 2.45 | 2.59 |
| 1 Person Households | 758, 20.23%, see rank | 27.44% | 25.82% |
| 2 or More Person Households | 2,989, 79.77%, see rank | 72.56% | 74.18% |
| Family Households (Families) | 2,846, 75.95%, see rank | 66.19% | 68.06% |
| Average Family Size | 3.03, see rank | 2.99 | 3.14 |
| Married-Couple Family | 2,515, 67.12%, see rank | 53.55% | 51.66% |
| Nonfamily Households | 901, 24.05%, 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.