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Census data for Nordby parish
| 1787 | 15 | 1,197 | 536 | 44.78% | 661 | 55.22% | 0 | 0.00% | 0 |
| 1801 | 42 | 1,363 | 622 | 45.63% | 741 | 54.37% | 0 | 0.00% | 18 |
| 1834 | 43 | 1,709 | 829 | 48.51% | 880 | 51.49% | 0 | 0.00% | 0 |
| 1840 | 46 | 1,738 | 829 | 47.70% | 909 | 52.30% | 0 | 0.00% | 0 |
| 1845 | 66 | 1,819 | 861 | 47.33% | 958 | 52.67% | 0 | 0.00% | 0 |
| 1850 | 41 | 1,852 | 869 | 46.92% | 973 | 52.54% | 10 | 0.54% | 0 |
| 1855 | 67 | 1,870 | 0 | 0.00% | 0 | 0.00% | 1,870 | 100.00% | 0 |
| 1860 | 36 | 1,927 | 920 | 47.74% | 1,007 | 52.26% | 0 | 0.00% | 0 |
| 1870 | 115 | 136 | 58 | 42.65% | 70 | 51.47% | 8 | 5.88% | |
| 1880 | 222 | 2,487 | 1,171 | 47.08% | 1,316 | 52.92% | 0 | 0.00% | 929 |
| 1890 | 183 | 2,472 | 1,171 | 47.37% | 1,299 | 52.55% | 2 | 0.08% | 0 |
| 1901 | 1,770 | 2,727 | 1,302 | 47.74% | 1,423 | 52.18% | 2 | 0.07% | 2,719 |
| 1906 | 196 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1911 | 224 | 4 | 2 | 50.00% | 2 | 50.00% | 0 | 0.00% | |
| 1916 | 8 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1921 | 193 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1925 | 218 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1930 | 166 | 2,229 | 999 | 44.82% | 1,230 | 55.18% | 0 | 0.00% | 2,190 |
| 1940 | 1,266 | 2,083 | 979 | 47.00% | 1,104 | 53.00% | 0 | 0.00% | 0 |
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