Polk County, IA
Population and Components of Change
| Date |
Population |
%
Change |
Components of Change |
Total
Population
Change |
Births |
Deaths |
Inter-
national
Immigra-
tion |
Net
Domestic
Migration |
| 1970 | 286,130 | - | - |
- | - | - | - |
| 1971 | 291,300 | 1.8 | 5,170 |
- | - | - | - |
| 1972 | 292,800 | 0.5 | 1,500 |
- | - | - | - |
| 1973 | 297,300 | 1.5 | 4,500 |
- | - | - | - |
| 1974 | 300,800 | 1.2 | 3,500 |
- | - | - | - |
| 1975 | 303,100 | 0.8 | 2,300 |
- | - | - | - |
| 1976 | 304,500 | 0.5 | 1,400 |
- | - | - | - |
| 1977 | 302,100 | -0.8 | -2,400 |
- | - | - | - |
| 1978 | 302,900 | 0.3 | 800 |
- | - | - | - |
| 1979 | 302,300 | -0.2 | -600 |
- | - | - | - |
| 1980 | 303,170 | 0.3 | 870 |
- | - | - | - |
| 1981 | 304,865 | 0.6 | 1,695 |
6,362 | 3,039 | - | - |
| 1982 | 304,567 | -0.1 | -298 |
5,031 | 2,383 | - | - |
| 1983 | 305,725 | 0.4 | 1,158 |
4,972 | 2,417 | - | - |
| 1984 | 307,092 | 0.4 | 1,367 |
4,942 | 2,444 | - | - |
| 1985 | 308,349 | 0.4 | 1,257 |
4,997 | 2,480 | - | - |
| 1986 | 309,714 | 0.4 | 1,365 |
5,021 | 2,516 | - | - |
| 1987 | 312,846 | 1.0 | 3,132 |
4,972 | 2,492 | - | - |
| 1988 | 317,114 | 1.4 | 4,268 |
4,993 | 2,544 | - | - |
| 1989 | 322,465 | 1.7 | 5,351 |
5,272 | 2,588 | - | - |
| 1990 | 327,140 | 1.4 | 4,675 |
4,159 | 1,928 | - | - |
| 1991 | 333,568 | 2.0 | 6,428 |
6,688 | 3,163 | 517 | 1,601 |
| 1992 | 339,643 | 1.8 | 6,075 |
5,631 | 2,527 | 621 | 1,722 |
| 1993 | 345,143 | 1.6 | 5,500 |
5,615 | 2,600 | 508 | 1,276 |
| 1994 | 349,349 | 1.2 | 4,206 |
5,512 | 2,606 | 621 | -46 |
| 1995 | 354,096 | 1.4 | 4,747 |
5,296 | 2,651 | 797 | 656 |
| 1996 | 357,986 | 1.1 | 3,890 |
5,576 | 2,703 | 907 | -486 |
| 1997 | 360,985 | 0.8 | 2,999 |
5,926 | 2,789 | 1,122 | -1,949 |
| 1998 | 365,086 | 1.1 | 4,101 |
5,778 | 2,726 | 1,417 | -959 |
| 1999 | 370,592 | 1.5 | 5,506 |
5,972 | 2,856 | 1,854 | 140 |
| 2000 | 374,601 | 1.1 | 4,009 |
- | - | - | - |
| 2001 | 381,216 | 1.8 | 6,615 |
7,730 | 3,390 | 1,965 | 10 |
| 2002 | 386,216 | 1.3 | 5,000 |
6,090 | 2,859 | 1,505 | 76 |
| 2003 | 390,788 | 1.2 | 4,572 |
6,264 | 2,795 | 1,287 | -222 |
| 2004 | 394,969 | 1.1 | 4,181 |
6,308 | 2,867 | 1,217 | -208 |
| 2005 | 403,490 | 2.2 | 8,521 |
6,560 | 2,814 | 1,222 | 2,558 |
| 2006 | 411,027 | 1.9 | 7,537 |
6,738 | 2,764 | 1,273 | 2,275 |
| 2007 | 418,339 | 1.8 | 7,312 |
6,792 | 2,848 | 1,260 | 2,042 |
Note: Decade years represent April 1, Census data, not the mid-year estimates.
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