Formed December 26, 1883 (13th county)
Yellowstone County (164,722), Billings (117,142)
The 1954 Modern tan brick building is the current courthouse. There was a classic 1905 courthouse earlier also in Billings, the only county seat. Yellowstone County was created on December 26, 1883 as the 13th county. It is named for the Yellowstone River. Billings is named for railroad officer Frederick H. Billings. The courthouse is sited on 27th Street at 2nd Avenue. United States Highway 312 passes one block south of the site. Chandler C. Cohagen is the building architect.
Yellowstone County government consists of a sheriff and 3 Commissioners. Five District Court Judges serve Yellowstone County. Yellowstone County is in southeastern Montana. The Yellowstone River flows through the county. Great Falls, Montana is northwest and Missoula, Montana is west of the county. The county center is 4.1 miles East of Billings. The county is surrounded clockwise by Musselshell, Rosebud, Treasure, Big Horn, Carbon, Stillwater, and Golden Valley counties.
The area of the county is 2635 square miles. It is 23 out of 56 in the state. It ranks 1 out of 56 in population in the state. It has a density of 62.5 persons per square mile making it 1 out of 56 in the state. Yellowstone County has 75.6% of its population in its incorporated areas. Interstate Highway 90 goes east to west in the county from Big Horn County to Stillwater County. Interstate Highway 94 enters from the east, Treasure County, and terminates. United States Highway 87 comes from the north, Musselshell County, joins Interstate Highway 90 into Big Horn County. United States Highway 212 enters joined with Interstate Highway 90 from Big Horn County, splits and exits southwest into Carbon County. United States Highway 310 originates and joins United States Highway 212 into Carbon County. The county looks like a sea horse. Billings is located in the southwest part of the state. Billings is the county seat and the largest city. It is 71.1% of the county population. This county is in the Billings Metropolitan Statistical Area.
Billings
Broadview
Laurel
