Montana - Population
| Date | Density | Population |
|---|---|---|
| 2023 | 3 | 1,132,812 |
| 2022 | 3 | 1,122,878 |
| 2021 | 3 | 1,106,366 |
| 2020 | 3 | 1,087,211 |
| 2019 | 3 | 1,075,462 |
| 2018 | 3 | 1,066,542 |
| 2017 | 3 | 1,057,982 |
| 2016 | 3 | 1,045,648 |
| 2015 | 3 | 1,034,413 |
| 2014 | 3 | 1,024,998 |
| 2013 | 3 | 1,015,933 |
| 2012 | 3 | 1,005,385 |
| 2011 | 3 | 998,188 |
| 2010 | 3 | 990,863 |
| 2009 | 3 | 983,982 |
| 2008 | 3 | 976,415 |
| 2007 | 3 | 964,706 |
| 2006 | 3 | 952,692 |
| 2005 | 2 | 940,102 |
| 2004 | 2 | 930,009 |
| 2003 | 2 | 919,630 |
| 2002 | 2 | 911,667 |
| 2001 | 2 | 906,961 |
| 2000 | 2 | 903,773 |
| 1999 | 2 | 897,507 |
| 1998 | 2 | 892,431 |
| 1997 | 2 | 889,865 |
| 1996 | 2 | 886,254 |
| 1995 | 2 | 876,553 |
| 1994 | 2 | 861,306 |
| 1993 | 2 | 844,761 |
| 1992 | 2 | 825,770 |
| 1991 | 2 | 809,680 |
| 1990 | 2 | 800,204 |
| 1989 | 2 | 799,634 |
| 1988 | 2 | 800,200 |
| 1987 | 2 | 805,064 |
| 1986 | 2 | 813,738 |
| 1985 | 2 | 822,320 |
| 1984 | 2 | 820,904 |
| 1983 | 2 | 814,029 |
| 1982 | 2 | 803,984 |
| 1981 | 2 | 795,325 |
| 1980 | 2 | 788,752 |
| 1979 | 2 | 789,167 |
| 1978 | 2 | 784,043 |
| 1977 | 2 | 771,354 |
| 1976 | 2 | 758,521 |
| 1975 | 2 | 749,208 |
| 1974 | 2 | 737,203 |
| 1973 | 2 | 727,389 |
| 1972 | 2 | 719,138 |
| 1971 | 2 | 711,037 |
| 1970 | 2 | 697,172 |
| 1969 | 2 | 694,000 |
| 1968 | 2 | 700,000 |
| 1967 | 2 | 701,000 |
| 1966 | 2 | 707,000 |
| 1965 | 2 | 706,000 |
| 1964 | 2 | 706,000 |
| 1963 | 2 | 703,000 |
| 1962 | 2 | 698,000 |
| 1961 | 2 | 696,000 |
| 1960 | 2 | 679,000 |
| 1959 | 2 | 669,000 |
| 1958 | 2 | 666,000 |
| 1957 | 2 | 667,000 |
| 1956 | 2 | 656,000 |
| 1955 | 2 | 636,000 |
| 1954 | 2 | 624,000 |
| 1953 | 2 | 616,000 |
| 1952 | 2 | 602,000 |
| 1951 | 2 | 596,000 |
| 1950 | 2 | 593,000 |
| 1949 | 1 | 569,000 |
| 1948 | 1 | 542,000 |
| 1947 | 1 | 530,000 |
| 1946 | 1 | 514,000 |
| 1945 | 1 | 477,000 |
| 1944 | 1 | 471,000 |
| 1943 | 1 | 483,000 |
| 1942 | 1 | 521,000 |
| 1941 | 1 | 543,000 |
| 1940 | 1 | 558,000 |
| 1939 | 1 | 555,000 |
| 1938 | 1 | 552,000 |
| 1937 | 1 | 554,000 |
| 1936 | 1 | 554,000 |
| 1935 | 1 | 550,000 |
| 1934 | 1 | 545,000 |
| 1933 | 1 | 541,000 |
| 1932 | 1 | 540,000 |
| 1931 | 1 | 540,000 |
| 1930 | 1 | 539,000 |
| 1929 | 1 | 524,000 |