Yellowstone County, Montana
Yellowstone County is the most populous county in the U.S. state of Montana. As of the 2020 census, the population was 164,731. Its county seat is Billings, the state's most populous city. Like the nearby park, Yellowstone County is named after the Yellowstone River which roughly bisects the county, flowing southwest to northeast. The river, in turn, was named for the yellow sandstone cliffs in what is now Yellowstone County. Yellowstone County is included in the Billings, Montana Metropolitan Statistical Area. Geography According to the United States Census Bureau, the county has a total area of , of which is land and (0.6%) is water. Major highways Transit Billings Metropolitan Transit Express Arrow Jefferson Lines Adjacent counties Musselshell County – north Rosebud County – northeast Treasure County – east Big Horn County – southeast Carbon County – southwest Stillwater County – west Golden Valley County – northwest National protected areas Nez Perce National Historical Park (part) Pompeys Pillar National Monument Demographics 2020 census As of the census of 2020 there were 164,731 people. 2010 census As of the census of 2010, there were 147,972 people, 60,672 households, and 38,367 families residing in the county. The population density was . There were 63,943 housing units at an average density of . The racial makeup of the county was 90.7% white, 4.0% American Indian, 0.6% black or African American, 0.6% Asian, 0.1% Pacific islander, 1.2% from other races, and 2.8% from two or more races. Those of Hispanic or Latino origin made up 4.7% of the population. In terms of ancestry, 32.4% were German, 14.0% were Irish, 11.3% were English, 10.0% were American, and 9.9% were Norwegian. Of the 60,672 households, 30.5% had children under the age of 18 living with them, 48.0% were married couples living together, 10.5% had a female householder with no husband present, 36.8% were non-families, and 29.7% of all households were made up of individuals. The average household size was 2.38 and the average family size was 2.94. The median age was 38.3 years. The median income for a household in the county was $48,641 and the median income for a family was $62,380. Males had a median income of $42,899 versus $30,403 for females. The per capita income for the county was $26,152. About 7.9% of families and 11.2% of the population were below the poverty line, including 15.6% of those under age 18 and 7.7% of those age 65 or over. Politics Yellowstone County is rather conservative for an urban county. Its voters have been reliably Republican for the better part of a century. They have selected the Democratic Party candidate in only one national election since 1940 (as of 2020). Communities Cities Billings (county seat) Laurel Town Broadview Census-designated places Acton Ballantine Custer Huntley Lockwood Mountain View Colony Nibbe Pompeys Pillar Shepherd Worden Other unincorporated communities Anita Billings Heights Bull Mountain Comanche Hesper Homewood Park Indian Arrow Newton Osborn Yegen Ghost towns Coulson Mossmain Rimrock Waco See also List of lakes in Yellowstone County,