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Folketællinger i Olstrup sogn
| 1787 | 7 | 218 | 100 | 45,87% | 118 | 54,13% | 0 | 0,00% | 0 |
| 1801 | 11 | 225 | 114 | 50,67% | 111 | 49,33% | 0 | 0,00% | 0 |
| 1834 | 11 | 270 | 136 | 50,37% | 134 | 49,63% | 0 | 0,00% | 0 |
| 1840 | 11 | 315 | 160 | 50,79% | 155 | 49,21% | 0 | 0,00% | 0 |
| 1845 | 11 | 322 | 162 | 50,31% | 160 | 49,69% | 0 | 0,00% | 0 |
| 1850 | 13 | 328 | 164 | 50,00% | 164 | 50,00% | 0 | 0,00% | 0 |
| 1855 | 17 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
| 1860 | 8 | 363 | 187 | 51,52% | 176 | 48,48% | 0 | 0,00% | 0 |
| 1870 | 30 | 431 | 229 | 53,13% | 202 | 46,87% | 0 | 0,00% | 0 |
| 1880 | 36 | 451 | 236 | 52,33% | 215 | 47,67% | 0 | 0,00% | 390 |
| 1890 | 43 | 477 | 231 | 48,43% | 246 | 51,57% | 0 | 0,00% | 454 |
| 1901 | 308 | 490 | 247 | 50,41% | 242 | 49,39% | 1 | 0,20% | 474 |
| 1906 | 45 | 508 | 262 | 51,57% | 246 | 48,43% | 0 | 0,00% | 0 |
| 1911 | 56 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
| 1916 | 46 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
| 1921 | 40 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
| 1925 | 57 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
| 1930 | 42 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
| 1940 | 366 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
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