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Folketællinger i Orø sogn
| 1787 | 14 | 372 | 186 | 50,00% | 186 | 50,00% | 0 | 0,00% | 0 |
| 1801 | 18 | 400 | 206 | 51,50% | 194 | 48,50% | 0 | 0,00% | 0 |
| 1834 | 13 | 556 | 272 | 48,92% | 284 | 51,08% | 0 | 0,00% | 0 |
| 1840 | 16 | 602 | 297 | 49,34% | 305 | 50,66% | 0 | 0,00% | 0 |
| 1845 | 24 | 625 | 294 | 47,04% | 331 | 52,96% | 0 | 0,00% | 0 |
| 1850 | 19 | 643 | 301 | 46,81% | 342 | 53,19% | 0 | 0,00% | 0 |
| 1855 | 24 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
| 1860 | 14 | 622 | 294 | 47,27% | 328 | 52,73% | 0 | 0,00% | 0 |
| 1870 | 36 | 741 | 380 | 51,28% | 361 | 48,72% | 0 | 0,00% | 732 |
| 1880 | 50 | 742 | 376 | 50,67% | 366 | 49,33% | 0 | 0,00% | 0 |
| 1890 | 63 | 677 | 331 | 48,89% | 346 | 51,11% | 0 | 0,00% | 0 |
| 1901 | 569 | 816 | 406 | 49,75% | 410 | 50,25% | 0 | 0,00% | 0 |
| 1906 | 87 | 907 | 469 | 51,71% | 438 | 48,29% | 0 | 0,00% | 0 |
| 1911 | 96 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
| 1916 | 87 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
| 1921 | 80 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
| 1925 | 90 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
| 1930 | 75 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
| 1940 | 679 | 10 | 2 | 20,00% | 8 | 80,00% | 0 | 0,00% | 0 |
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