Union County, SD Population and Components of Change
| Date |
Population |
% Change |
Components of Change |
Total Population Change |
Births |
Deaths |
Inter- national Immigra- tion |
Net Domestic Migration |
| 1970 | 9,643 | - | - |
- | - | - | - |
| 1971 | 9,800 | 1.6 | 157 |
- | - | - | - |
| 1972 | 10,000 | 2.0 | 200 |
- | - | - | - |
| 1973 | 10,100 | 1.0 | 100 |
- | - | - | - |
| 1974 | 10,100 | 0.0 | 0 |
- | - | - | - |
| 1975 | 10,300 | 2.0 | 200 |
- | - | - | - |
| 1976 | 10,500 | 1.9 | 200 |
- | - | - | - |
| 1977 | 10,700 | 1.9 | 200 |
- | - | - | - |
| 1978 | 10,600 | -0.9 | -100 |
- | - | - | - |
| 1979 | 10,700 | 0.9 | 100 |
- | - | - | - |
| 1980 | 10,938 | 2.2 | 238 |
- | - | - | - |
| 1981 | 10,984 | 0.4 | 46 |
265 | 148 | - | - |
| 1982 | 10,800 | -1.7 | -184 |
184 | 116 | - | - |
| 1983 | 10,683 | -1.1 | -117 |
167 | 118 | - | - |
| 1984 | 10,507 | -1.6 | -176 |
162 | 112 | - | - |
| 1985 | 10,262 | -2.3 | -245 |
147 | 113 | - | - |
| 1986 | 10,252 | -0.1 | -10 |
132 | 123 | - | - |
| 1987 | 10,179 | -0.7 | -73 |
130 | 102 | - | - |
| 1988 | 10,326 | 1.4 | 147 |
144 | 101 | - | - |
| 1989 | 10,237 | -0.9 | -89 |
138 | 109 | - | - |
| 1990 | 10,189 | -0.5 | -48 |
95 | 78 | - | - |
| 1991 | 10,339 | 1.5 | 150 |
169 | 139 | 2 | 108 |
| 1992 | 10,462 | 1.2 | 123 |
118 | 107 | 1 | 104 |
| 1993 | 10,643 | 1.7 | 181 |
130 | 90 | 2 | 135 |
| 1994 | 11,111 | 4.4 | 468 |
157 | 111 | 2 | 416 |
| 1995 | 11,305 | 1.7 | 194 |
139 | 111 | 8 | 148 |
| 1996 | 11,728 | 3.7 | 423 |
140 | 106 | 5 | 365 |
| 1997 | 12,019 | 2.5 | 291 |
157 | 111 | 12 | 216 |
| 1998 | 12,371 | 2.9 | 352 |
152 | 100 | 12 | 275 |
| 1999 | 12,586 | 1.7 | 215 |
151 | 112 | 12 | 160 |
| 2000 | 12,584 | 0.0 | -2 |
- | - | - | - |
| 2001 | 12,636 | 0.4 | 52 |
220 | 140 | 22 | -38 |
| 2002 | 12,805 | 1.3 | 169 |
169 | 96 | 20 | 89 |
| 2003 | 12,985 | 1.4 | 180 |
175 | 105 | 18 | 105 |
| 2004 | 13,157 | 1.3 | 172 |
160 | 88 | 21 | 90 |
| 2005 | 13,302 | 1.1 | 145 |
175 | 97 | 20 | 59 |
| 2006 | 13,591 | 2.2 | 289 |
178 | 85 | 22 | 181 |
| 2007 | 13,933 | 2.5 | 342 |
188 | 112 | 18 | 252 |
| 2008 | 14,131 | 1.4 | 198 |
190 | 101 | 20 | 90 |
Note: Decade years represent April 1, Census data, not the mid-year estimates.
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