Chouteau County Population 2018
Chouteau County's estimated population is 5,765 with a growth rate of -0.50% in the past year according to the most recent United States census data. Chouteau County is the 34th largest county in Montana.
| Year | Population | Growth | Growth Rate |
| 2017 | 5,765 | -29 | -0.50% |
| 2016 | 5,794 | 27 | 0.47% |
| 2015 | 5,767 | -122 | -2.07% |
| 2014 | 5,889 | 46 | 0.79% |
| 2013 | 5,843 | -87 | -1.47% |
| 2012 | 5,930 | 122 | 2.10% |
| 2011 | 5,808 | 0.00% | |
| 2010 | 5,808 | 356 | 6.53% |
| 1990 | 5,452 | -640 | -10.51% |
| 1980 | 6,092 | -381 | -5.89% |
| 1970 | 6,473 | -875 | -11.91% |
| 1960 | 7,348 | 374 | 5.36% |
| 1950 | 6,974 | -342 | -4.67% |
| 1940 | 7,316 | -1,319 | -15.28% |
| 1930 | 8,635 | -2,416 | -21.86% |
| 1920 | 11,051 | -6,140 | -35.72% |
| 1910 | 17,191 | 6,225 | 56.77% |
| 1900 | 10,966 | 6,225 | 131.30% |
| 1890 | 4,741 | 1,683 | 55.04% |
| 1880 | 3,058 | 2,541 | 491.49% |
| 1870 | 517 | 0.00% |