Delaware 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 | 18,770 | - | - |
- | - | - | - |
| 1971 | 18,400 | -2.0 | -370 |
- | - | - | - |
| 1972 | 18,800 | 2.2 | 400 |
- | - | - | - |
| 1973 | 18,800 | 0.0 | 0 |
- | - | - | - |
| 1974 | 18,700 | -0.5 | -100 |
- | - | - | - |
| 1975 | 18,900 | 1.1 | 200 |
- | - | - | - |
| 1976 | 18,900 | 0.0 | 0 |
- | - | - | - |
| 1977 | 18,800 | -0.5 | -100 |
- | - | - | - |
| 1978 | 18,800 | 0.0 | 0 |
- | - | - | - |
| 1979 | 18,700 | -0.5 | -100 |
- | - | - | - |
| 1980 | 18,933 | 1.2 | 233 |
- | - | - | - |
| 1981 | 18,853 | -0.4 | -80 |
466 | 221 | - | - |
| 1982 | 18,718 | -0.7 | -135 |
347 | 178 | - | - |
| 1983 | 18,729 | 0.1 | 11 |
352 | 176 | - | - |
| 1984 | 18,751 | 0.1 | 22 |
326 | 175 | - | - |
| 1985 | 18,514 | -1.3 | -237 |
316 | 180 | - | - |
| 1986 | 18,060 | -2.5 | -454 |
301 | 177 | - | - |
| 1987 | 17,926 | -0.7 | -134 |
283 | 166 | - | - |
| 1988 | 17,985 | 0.3 | 59 |
287 | 157 | - | - |
| 1989 | 18,054 | 0.4 | 69 |
277 | 163 | - | - |
| 1990 | 18,035 | -0.1 | -19 |
198 | 124 | - | - |
| 1991 | 18,139 | 0.6 | 104 |
349 | 190 | -2 | -30 |
| 1992 | 18,271 | 0.7 | 132 |
264 | 156 | 7 | 38 |
| 1993 | 18,269 | 0.0 | -2 |
273 | 172 | -4 | -83 |
| 1994 | 18,322 | 0.3 | 53 |
278 | 164 | 5 | -47 |
| 1995 | 18,347 | 0.1 | 25 |
233 | 163 | 5 | -34 |
| 1996 | 18,324 | -0.1 | -23 |
217 | 168 | 3 | -59 |
| 1997 | 18,380 | 0.3 | 56 |
219 | 170 | 0 | 18 |
| 1998 | 18,487 | 0.6 | 107 |
218 | 152 | -1 | 36 |
| 1999 | 18,444 | -0.2 | -43 |
220 | 173 | -1 | -100 |
| 2000 | 18,404 | -0.2 | -40 |
- | - | - | - |
| 2001 | 18,212 | -1.0 | -192 |
265 | 192 | 1 | -250 |
| 2002 | 18,123 | -0.5 | -89 |
187 | 160 | 1 | -99 |
| 2003 | 17,978 | -0.8 | -145 |
224 | 168 | 1 | -188 |
| 2004 | 17,798 | -1.0 | -180 |
205 | 139 | 0 | -229 |
| 2005 | 17,622 | -1.0 | -176 |
194 | 167 | 1 | -195 |
| 2006 | 17,511 | -0.6 | -111 |
238 | 156 | 0 | -184 |
| 2007 | 17,450 | -0.3 | -61 |
203 | 156 | 1 | -86 |
| 2008 | 17,301 | -0.9 | -149 |
226 | 148 | 0 | -194 |
Note: Decade years represent April 1, Census data, not the mid-year estimates.
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