Carter County, Montana Population 2019
Carter County, Montana's estimated population is 1,222 with a growth rate of 3.82% in the past year according to the most recent United States census data. Carter County, Montana is the 51st largest county in Montana.
| Year | Population | Growth | Growth Rate |
| 2017 | 1,222 | 45 | 3.82% |
| 2016 | 1,177 | 30 | 2.62% |
| 2015 | 1,147 | -4 | -0.35% |
| 2014 | 1,151 | -2 | -0.17% |
| 2013 | 1,153 | -4 | -0.35% |
| 2012 | 1,157 | 21 | 1.85% |
| 2011 | 1,136 | -24 | -2.07% |
| 2010 | 1,160 | -343 | -22.82% |
| 1990 | 1,503 | -296 | -16.45% |
| 1980 | 1,799 | -157 | -8.03% |
| 1970 | 1,956 | -537 | -21.54% |
| 1960 | 2,493 | -305 | -10.90% |
| 1950 | 2,798 | -482 | -14.70% |
| 1940 | 3,280 | -856 | -20.70% |
| 1930 | 4,136 | 164 | 4.13% |
| 1920 | 3,972 | 0.00% |