Census data for Sønderborg County
| 1769 | 3 | 4 | 12 | 805 | 403 | 50.06% | 402 | 49.94% | 0 | 0.00% | 138 |
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| 1803 | 3 | 20 | 638 | 23,653 | 11,435 | 48.34% | 12,214 | 51.64% | 4 | 0.02% | 20,949 |
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| 1835 | 3 | 20 | 572 | 2 | 1 | 50.00% | 0 | 0.00% | 1 | 50.00% | |
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| 1840 | 3 | 20 | 619 | 8 | 4 | 50.00% | 3 | 37.50% | 1 | 12.50% | |
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| 1845 | 3 | 20 | 500 | 29,773 | 14,542 | 48.84% | 15,224 | 51.13% | 7 | 0.02% | 25,246 |
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| 1850 | 3 | 20 | 0 | 1 | 1 | 100.00% | 0 | 0.00% | 0 | 0.00% | |
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| 1855 | 3 | 20 | 754 | 2 | 1 | 50.00% | 1 | 50.00% | 0 | 0.00% | |
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| 1860 | 3 | 20 | 974 | 31,870 | 15,472 | 48.55% | 16,383 | 51.41% | 15 | 0.05% | 7,163 |
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| 1921 | 3 | 20 | 6,085 | 2,634 | 1,269 | 48.18% | 1,355 | 51.44% | 10 | 0.38% | 0 |
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| 1925 | 3 | 20 | 7,780 | 32 | 18 | 56.25% | 8 | 25.00% | 6 | 18.75% | |
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| 1930 | 3 | 20 | 9,184 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
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| 1940 | 3 | 20 | 23,617 | 1,319 | 680 | 51.55% | 629 | 47.69% | 10 | 0.76% | 0 |