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Folketællinger i Udby sogn
| 1787 | 13 | 536 | 268 | 50,00% | 268 | 50,00% | 0 | 0,00% | 0 |
| 1801 | 15 | 511 | 241 | 47,16% | 270 | 52,84% | 0 | 0,00% | 0 |
| 1834 | 15 | 576 | 280 | 48,61% | 296 | 51,39% | 0 | 0,00% | 0 |
| 1840 | 18 | 636 | 309 | 48,58% | 327 | 51,42% | 0 | 0,00% | 0 |
| 1845 | 20 | 653 | 325 | 49,77% | 328 | 50,23% | 0 | 0,00% | 0 |
| 1850 | 25 | 704 | 336 | 47,73% | 368 | 52,27% | 0 | 0,00% | 0 |
| 1855 | 24 | 683 | 337 | 49,34% | 346 | 50,66% | 0 | 0,00% | 0 |
| 1860 | 14 | 687 | 317 | 46,14% | 369 | 53,71% | 1 | 0,15% | 0 |
| 1870 | 47 | 748 | 364 | 48,66% | 384 | 51,34% | 0 | 0,00% | 748 |
| 1880 | 58 | 788 | 392 | 49,75% | 396 | 50,25% | 0 | 0,00% | 788 |
| 1890 | 57 | 733 | 367 | 50,07% | 366 | 49,93% | 0 | 0,00% | 733 |
| 1901 | 437 | 657 | 333 | 50,68% | 324 | 49,32% | 0 | 0,00% | 567 |
| 1906 | 66 | 653 | 335 | 51,30% | 318 | 48,70% | 0 | 0,00% | 0 |
| 1911 | 70 | 716 | 369 | 51,54% | 347 | 48,46% | 0 | 0,00% | 0 |
| 1916 | 59 | 698 | 357 | 51,15% | 336 | 48,14% | 5 | 0,72% | 585 |
| 1921 | 64 | 684 | 346 | 50,58% | 338 | 49,42% | 0 | 0,00% | 684 |
| 1925 | 65 | 721 | 372 | 51,60% | 349 | 48,40% | 0 | 0,00% | 0 |
| 1930 | 56 | 640 | 318 | 49,69% | 322 | 50,31% | 0 | 0,00% | 0 |
| 1940 | 316 | 596 | 309 | 51,85% | 287 | 48,15% | 0 | 0,00% | 516 |
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