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Folketællinger i Udby sogn
| 1787 | 19 | 466 | 223 | 47,85% | 243 | 52,15% | 0 | 0,00% | 0 |
| 1801 | 17 | 482 | 243 | 50,41% | 239 | 49,59% | 0 | 0,00% | 0 |
| 1834 | 16 | 637 | 296 | 46,47% | 341 | 53,53% | 0 | 0,00% | 44 |
| 1840 | 16 | 662 | 334 | 50,45% | 328 | 49,55% | 0 | 0,00% | 0 |
| 1845 | 29 | 747 | 364 | 48,73% | 383 | 51,27% | 0 | 0,00% | 0 |
| 1850 | 27 | 811 | 391 | 48,21% | 420 | 51,79% | 0 | 0,00% | 0 |
| 1855 | 33 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
| 1860 | 19 | 916 | 443 | 48,36% | 473 | 51,64% | 0 | 0,00% | 0 |
| 1870 | 56 | 897 | 442 | 49,28% | 455 | 50,72% | 0 | 0,00% | 897 |
| 1880 | 170 | 911 | 452 | 49,62% | 448 | 49,18% | 11 | 1,21% | 0 |
| 1890 | 73 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
| 1901 | 565 | 824 | 411 | 49,88% | 413 | 50,12% | 0 | 0,00% | 709 |
| 1906 | 75 | 868 | 447 | 51,50% | 421 | 48,50% | 0 | 0,00% | 0 |
| 1911 | 79 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
| 1916 | 96 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
| 1921 | 81 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
| 1925 | 98 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
| 1930 | 84 | 1.035 | 515 | 49,76% | 520 | 50,24% | 0 | 0,00% | 0 |
| 1940 | 772 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
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