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Folketællinger i Udby sogn
| 1787 | 7 | 239 | 114 | 47,70% | 125 | 52,30% | 0 | 0,00% | 0 |
| 1801 | 13 | 256 | 122 | 47,66% | 134 | 52,34% | 0 | 0,00% | 0 |
| 1834 | 11 | 281 | 140 | 49,82% | 141 | 50,18% | 0 | 0,00% | 0 |
| 1840 | 10 | 292 | 140 | 47,95% | 152 | 52,05% | 0 | 0,00% | 0 |
| 1845 | 14 | 301 | 145 | 48,17% | 156 | 51,83% | 0 | 0,00% | 0 |
| 1850 | 9 | 298 | 148 | 49,66% | 150 | 50,34% | 0 | 0,00% | 0 |
| 1855 | 12 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
| 1860 | 8 | 345 | 169 | 48,99% | 176 | 51,01% | 0 | 0,00% | 0 |
| 1870 | 23 | 7 | 4 | 57,14% | 2 | 28,57% | 1 | 14,29% | |
| 1880 | 34 | 425 | 208 | 48,94% | 217 | 51,06% | 0 | 0,00% | 425 |
| 1890 | 36 | 453 | 216 | 47,68% | 237 | 52,32% | 0 | 0,00% | 453 |
| 1901 | 280 | 466 | 222 | 47,64% | 244 | 52,36% | 0 | 0,00% | 466 |
| 1906 | 43 | 65 | 30 | 46,15% | 35 | 53,85% | 0 | 0,00% | 0 |
| 1911 | 37 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
| 1916 | 41 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
| 1921 | 35 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
| 1925 | 42 | 3 | 2 | 66,67% | 1 | 33,33% | 0 | 0,00% | |
| 1930 | 66 | 2 | 1 | 50,00% | 1 | 50,00% | 0 | 0,00% | |
| 1940 | 224 | 2 | 1 | 50,00% | 1 | 50,00% | 0 | 0,00% | |
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