Iowa - Population
| Date | Densité | Population |
|---|---|---|
| 2024 | 22 | 3.241.488 |
| 2023 | 22 | 3.218.414 |
| 2022 | 22 | 3.202.820 |
| 2021 | 22 | 3.198.613 |
| 2020 | 22 | 3.191.141 |
| 2019 | 22 | 3.183.858 |
| 2018 | 22 | 3.171.540 |
| 2017 | 22 | 3.162.752 |
| 2016 | 22 | 3.149.607 |
| 2015 | 22 | 3.136.310 |
| 2014 | 21 | 3.121.790 |
| 2013 | 21 | 3.102.460 |
| 2012 | 21 | 3.082.748 |
| 2011 | 21 | 3.070.048 |
| 2010 | 21 | 3.051.473 |
| 2009 | 21 | 3.032.870 |
| 2008 | 21 | 3.016.734 |
| 2007 | 21 | 2.999.212 |
| 2006 | 20 | 2.982.644 |
| 2005 | 20 | 2.964.454 |
| 2004 | 20 | 2.953.635 |
| 2003 | 20 | 2.941.999 |
| 2002 | 20 | 2.934.234 |
| 2001 | 20 | 2.931.997 |
| 2000 | 20 | 2.929.067 |
| 1999 | 20 | 2.917.634 |
| 1998 | 20 | 2.902.872 |
| 1997 | 20 | 2.891.119 |
| 1996 | 20 | 2.880.000 |
| 1995 | 20 | 2.867.373 |
| 1994 | 20 | 2.850.746 |
| 1993 | 19 | 2.836.972 |
| 1992 | 19 | 2.818.401 |
| 1991 | 19 | 2.797.613 |
| 1990 | 19 | 2.781.018 |
| 1989 | 19 | 2.770.590 |
| 1988 | 19 | 2.768.393 |
| 1987 | 19 | 2.767.006 |
| 1986 | 19 | 2.791.969 |
| 1985 | 19 | 2.829.684 |
| 1984 | 20 | 2.858.615 |
| 1983 | 20 | 2.870.547 |
| 1982 | 20 | 2.888.190 |
| 1981 | 20 | 2.907.985 |
| 1980 | 20 | 2.914.018 |
| 1979 | 20 | 2.916.803 |
| 1978 | 20 | 2.919.008 |
| 1977 | 20 | 2.914.308 |
| 1976 | 20 | 2.903.770 |
| 1975 | 20 | 2.881.425 |
| 1974 | 20 | 2.867.941 |
| 1973 | 20 | 2.864.031 |
| 1972 | 20 | 2.860.506 |
| 1971 | 20 | 2.851.828 |
| 1970 | 19 | 2.828.534 |
| 1969 | 19 | 2.805.000 |
| 1968 | 19 | 2.803.000 |
| 1967 | 19 | 2.793.000 |
| 1966 | 19 | 2.762.000 |
| 1965 | 19 | 2.742.000 |
| 1964 | 19 | 2.746.000 |
| 1963 | 19 | 2.747.000 |
| 1962 | 19 | 2.750.000 |
| 1961 | 19 | 2.756.000 |
| 1960 | 19 | 2.756.000 |
| 1959 | 19 | 2.729.000 |
| 1958 | 19 | 2.708.000 |
| 1957 | 19 | 2.716.000 |
| 1956 | 19 | 2.703.000 |
| 1955 | 18 | 2.679.000 |
| 1954 | 18 | 2.626.000 |
| 1953 | 18 | 2.629.000 |
| 1952 | 18 | 2.626.000 |
| 1951 | 18 | 2.617.000 |
| 1950 | 18 | 2.625.000 |
| 1949 | 18 | 2.578.000 |
| 1948 | 17 | 2.543.000 |
| 1947 | 17 | 2.509.000 |
| 1946 | 17 | 2.467.000 |
| 1945 | 16 | 2.301.000 |
| 1944 | 16 | 2.294.000 |
| 1943 | 16 | 2.332.000 |
| 1942 | 17 | 2.441.000 |
| 1941 | 17 | 2.491.000 |
| 1940 | 17 | 2.537.000 |
| 1939 | 17 | 2.520.000 |
| 1938 | 17 | 2.494.000 |
| 1937 | 17 | 2.498.000 |
| 1936 | 17 | 2.509.000 |
| 1935 | 17 | 2.524.000 |
| 1934 | 17 | 2.510.000 |
| 1933 | 17 | 2.495.000 |
| 1932 | 17 | 2.489.000 |
| 1931 | 17 | 2.482.000 |
| 1930 | 17 | 2.475.000 |
| 1929 | 17 | 2.460.000 |