Sioux 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 | 27,996 | - | - |
- | - | - | - |
| 1971 | 28,100 | 0.4 | 104 |
- | - | - | - |
| 1972 | 28,200 | 0.4 | 100 |
- | - | - | - |
| 1973 | 28,500 | 1.1 | 300 |
- | - | - | - |
| 1974 | 28,900 | 1.4 | 400 |
- | - | - | - |
| 1975 | 29,000 | 0.3 | 100 |
- | - | - | - |
| 1976 | 29,500 | 1.7 | 500 |
- | - | - | - |
| 1977 | 29,900 | 1.4 | 400 |
- | - | - | - |
| 1978 | 30,300 | 1.3 | 400 |
- | - | - | - |
| 1979 | 30,600 | 1.0 | 300 |
- | - | - | - |
| 1980 | 30,813 | 0.7 | 213 |
- | - | - | - |
| 1981 | 30,654 | -0.5 | -159 |
769 | 292 | - | - |
| 1982 | 30,534 | -0.4 | -120 |
572 | 232 | - | - |
| 1983 | 30,698 | 0.5 | 164 |
567 | 231 | - | - |
| 1984 | 30,605 | -0.3 | -93 |
547 | 232 | - | - |
| 1985 | 30,439 | -0.5 | -166 |
515 | 257 | - | - |
| 1986 | 29,895 | -1.8 | -544 |
503 | 257 | - | - |
| 1987 | 29,596 | -1.0 | -299 |
476 | 237 | - | - |
| 1988 | 29,976 | 1.3 | 380 |
464 | 247 | - | - |
| 1989 | 29,876 | -0.3 | -100 |
452 | 247 | - | - |
| 1990 | 29,903 | 0.1 | 27 |
324 | 179 | - | - |
| 1991 | 30,125 | 0.7 | 222 |
565 | 244 | -5 | -114 |
| 1992 | 30,450 | 1.1 | 325 |
424 | 236 | 13 | 119 |
| 1993 | 30,965 | 1.7 | 515 |
451 | 242 | -1 | 291 |
| 1994 | 31,352 | 1.2 | 387 |
394 | 234 | 13 | 210 |
| 1995 | 31,347 | 0.0 | -5 |
411 | 225 | 18 | -221 |
| 1996 | 31,196 | -0.5 | -151 |
395 | 250 | 11 | -332 |
| 1997 | 31,473 | 0.9 | 277 |
412 | 251 | 5 | 90 |
| 1998 | 31,649 | 0.6 | 176 |
391 | 269 | 6 | 13 |
| 1999 | 31,669 | 0.1 | 20 |
413 | 255 | 10 | -234 |
| 2000 | 31,589 | -0.3 | -80 |
- | - | - | - |
| 2001 | 31,744 | 0.5 | 155 |
575 | 283 | 44 | -130 |
| 2002 | 31,799 | 0.2 | 55 |
459 | 267 | 35 | -130 |
| 2003 | 31,795 | 0.0 | -4 |
450 | 287 | 31 | -151 |
| 2004 | 31,886 | 0.3 | 91 |
458 | 253 | 25 | -107 |
| 2005 | 31,929 | 0.1 | 43 |
495 | 253 | 25 | -224 |
| 2006 | 32,132 | 0.6 | 203 |
491 | 216 | 26 | -98 |
| 2007 | 32,351 | 0.7 | 219 |
521 | 256 | 26 | -75 |
Note: Decade years represent April 1, Census data, not the mid-year estimates.
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