Yellowstone County Population 2018

Yellowstone County's estimated population is 158,980 with a growth rate of 0.84% in the past year according to the most recent United States census data. Yellowstone County is the 1st largest county in Montana.

Year Population Growth Growth Rate
2017158,9801,3320.84%
2016157,6481,3240.85%
2015156,3241,2280.79%
2014155,0961,4830.97%
2013153,6132,0071.32%
2012151,6061,9041.27%
2011149,7021,3460.91%
2010148,35634,93730.80%
1990113,4195,3844.98%
1980108,03520,66823.66%
197087,3678,35110.57%
196079,01623,14141.42%
195055,87514,69335.68%
194041,18210,39733.77%
193030,7851,1854.00%
192029,6006,65629.01%
191022,94416,732269.35%
19006,2124,147200.82%
18902,0650.00%

Yellowstone County Population Growth

Population Data via

Yellowstone County Race Data

Race Population Percentage
White143,14790.04%
American Indian and Alaska Native7,1674.51%
Two or More Races4,3792.75%
Black or African American1,0770.68%
Asian1,0590.67%
Native Hawaiian and Other Pacific Islander1170.07%

Yellowstone County Population Pyramid

0k1k2k3k4k5k6k Male Population0k1k2k3k4k5k6k Female Population8580757065605550454035302520151050
Data Sources
  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990