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Folketællinger i Søby sogn
| 1787 | 8 | 208 | 113 | 54,33% | 95 | 45,67% | 0 | 0,00% | 0 |
| 1801 | 8 | 252 | 129 | 51,19% | 123 | 48,81% | 0 | 0,00% | 0 |
| 1834 | 9 | 278 | 145 | 52,16% | 133 | 47,84% | 0 | 0,00% | 0 |
| 1840 | 9 | 285 | 150 | 52,63% | 135 | 47,37% | 0 | 0,00% | 0 |
| 1845 | 18 | 319 | 169 | 52,98% | 150 | 47,02% | 0 | 0,00% | 0 |
| 1850 | 11 | 331 | 170 | 51,36% | 161 | 48,64% | 0 | 0,00% | 0 |
| 1855 | 8 | 325 | 163 | 50,15% | 162 | 49,85% | 0 | 0,00% | 325 |
| 1860 | 7 | 366 | 199 | 54,37% | 167 | 45,63% | 0 | 0,00% | 0 |
| 1870 | 23 | 443 | 241 | 54,40% | 202 | 45,60% | 0 | 0,00% | 0 |
| 1880 | 37 | 479 | 242 | 50,52% | 237 | 49,48% | 0 | 0,00% | 0 |
| 1890 | 40 | 460 | 235 | 51,09% | 225 | 48,91% | 0 | 0,00% | 0 |
| 1901 | 296 | 494 | 258 | 52,23% | 236 | 47,77% | 0 | 0,00% | 0 |
| 1906 | 46 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
| 1911 | 60 | 468 | 242 | 51,71% | 226 | 48,29% | 0 | 0,00% | 468 |
| 1916 | 47 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
| 1921 | 41 | 27 | 11 | 40,74% | 15 | 55,56% | 1 | 3,70% | 0 |
| 1925 | 53 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
| 1930 | 43 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
| 1940 | 0 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
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