Jefferson County, Montana Facts
| Facts | |
| State | Montana |
| Land area | 1,656.3 square miles |
| Population Density | 6.9 persons per square mile. |
| Population | |
| Population (2013) | 11,512 |
| Population change | 0.9% | Under 5 years of age | 4.4% |
| Under 18 | 21.4% |
| 65 and over | 17.7% |
| Females | 49.1% |
| White | 95.3 |
| Hispanic or Latino of any race | 2.2 |
| Asian | 0.4% |
| Two or more races | 2.3% |
| Black or African American | 0.4% |
| Native American | 1.6% |
| Pacific Islander | 0% |
| Had graduated from high school | 94% |
| Had a bachelor’s degree or higher | 33.5% |
| Veterans | 1,397 |
| Households and Housing | |
| Households | 4,527 |
| Persons per household | 2.5 |
| Living in the same house for one year or more | 84.6% |
| Median household income | $60,863 |
| The per capita income | $30,397 |
| Live below the poverty line. | 7.8% |
| housing units | 5,029 |
| Multi-unit structures | 2% |
| The median value of owner-occupied housing | $230,100 |
| Residents owning their homes. | 85.9% |
| Business Facts | |
| Total number of firms | 757 |
| Women-owned firms | 0% |
| Asian-owned firms | 0% |
| Hispanic-owned firms | 0% |
| Black-owned firms | 0% |
| Native American-owned firms | 0% |
| Pacific Islander-owned firms | 0% |
| Retail sales | $39,880 |
| Retail sales per capita | $3,584 |
| Manufacturers shipments | $0 |
| Merchant wholesaler sales | $0 |