O'Brien 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 | 17,522 | - | - |
- | - | - | - |
| 1971 | 17,800 | 1.6 | 278 |
- | - | - | - |
| 1972 | 17,800 | 0.0 | 0 |
- | - | - | - |
| 1973 | 17,400 | -2.2 | -400 |
- | - | - | - |
| 1974 | 17,500 | 0.6 | 100 |
- | - | - | - |
| 1975 | 17,400 | -0.6 | -100 |
- | - | - | - |
| 1976 | 17,400 | 0.0 | 0 |
- | - | - | - |
| 1977 | 17,400 | 0.0 | 0 |
- | - | - | - |
| 1978 | 17,300 | -0.6 | -100 |
- | - | - | - |
| 1979 | 17,000 | -1.7 | -300 |
- | - | - | - |
| 1980 | 16,972 | -0.2 | -28 |
- | - | - | - |
| 1981 | 16,973 | 0.0 | 1 |
353 | 232 | - | - |
| 1982 | 16,859 | -0.7 | -114 |
281 | 191 | - | - |
| 1983 | 16,917 | 0.3 | 58 |
269 | 205 | - | - |
| 1984 | 16,696 | -1.3 | -221 |
249 | 197 | - | - |
| 1985 | 16,318 | -2.3 | -378 |
224 | 196 | - | - |
| 1986 | 15,925 | -2.4 | -393 |
210 | 177 | - | - |
| 1987 | 15,611 | -2.0 | -314 |
195 | 184 | - | - |
| 1988 | 15,556 | -0.4 | -55 |
179 | 205 | - | - |
| 1989 | 15,521 | -0.2 | -35 |
184 | 191 | - | - |
| 1990 | 15,444 | -0.5 | -77 |
146 | 137 | - | - |
| 1991 | 15,530 | 0.6 | 86 |
237 | 243 | -2 | 11 |
| 1992 | 15,638 | 0.7 | 108 |
196 | 199 | -3 | 45 |
| 1993 | 15,635 | 0.0 | -3 |
199 | 191 | 3 | -77 |
| 1994 | 15,646 | 0.1 | 11 |
170 | 185 | 2 | -41 |
| 1995 | 15,647 | 0.0 | 1 |
197 | 210 | 1 | -55 |
| 1996 | 15,456 | -1.2 | -191 |
179 | 206 | 2 | -227 |
| 1997 | 15,498 | 0.3 | 42 |
193 | 177 | 8 | -48 |
| 1998 | 15,457 | -0.3 | -41 |
197 | 184 | 0 | -108 |
| 1999 | 15,200 | -1.7 | -257 |
194 | 182 | 0 | -285 |
| 2000 | 15,102 | -0.6 | -98 |
- | - | - | - |
| 2001 | 14,886 | -1.4 | -216 |
224 | 235 | 14 | -210 |
| 2002 | 14,691 | -1.3 | -195 |
164 | 196 | 10 | -166 |
| 2003 | 14,601 | -0.6 | -90 |
155 | 180 | 8 | -61 |
| 2004 | 14,357 | -1.7 | -244 |
158 | 187 | 7 | -207 |
| 2005 | 14,269 | -0.6 | -88 |
191 | 182 | 5 | -91 |
| 2006 | 14,214 | -0.4 | -55 |
172 | 184 | 6 | -44 |
| 2007 | 14,062 | -1.1 | -152 |
182 | 194 | 6 | -148 |
Note: Decade years represent April 1, Census data, not the mid-year estimates.
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