Yellowstone County, Montana

Yellowstone County is a located in the  of. As of 2000, the population was 129,352. As of 2004, the population is estimated to be around 136,717. Projections to 2025 show an estimated population of 170,088, a growth of 32 percent. Its is. Yellowstone County is named for the. The river roughly bisects the county from southwest to northeast.

Geography
According to the, the county has a total area of 6,861 km² (2,649 ). 6,825 km² (2,635 sq mi) of it is land and 36 km² (14 sq mi) of it (0.52%) is water.

Adjacent Counties

 * - north
 * - northeast
 * - east
 * - south & southeast
 * - southwest
 * - west
 * - northwest

Demographics
As of the of 2000, there were 129,352 people, 52,084 households, and 34,219 families residing in the county. The was 19/km² (49/sq mi). There were 54,563 housing units at an average density of 8/km² (21/sq mi). The racial makeup of the county was 92.78% White, 0.45% Black or African American, 3.05% Native American, 0.54% Asian, 0.04% Pacific Islander, 1.26% from other races, and 1.87% from two or more races. 3.70% of the population were Hispanic or Latino of any race.

There were 52,084 households out of which 31.60% had children under the age of 18 living with them, 51.80% were living together, 10.10% had a female householder with no husband present, and 34.30% were non-families. 27.90% of all households were made up of individuals and 10.10% had someone living alone who was 65 years of age or older. The average household size was 2.43 and the average family size was 2.98.

In the county the population was spread out with 25.50% under the age of 18, 9.30% from 18 to 24, 28.70% from 25 to 44, 23.20% from 45 to 64, and 13.30% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 95.20 males. For every 100 females age 18 and over, there were 91.60 males.

The median income for a household in the county was $36,727, and the median income for a family was $45,277. Males had a median income of $33,475 versus $21,566 for females. The for the county was $19,303. About 8.50% of families and 11.10% of the population were below the, including 14.50% of those under age 18 and 7.40% of those age 65 or over.