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Census data for Tønder County
| 1769 | 5 | 23 | 0 | 5,424 | 2,496 | 46.02% | 2,928 | 53.98% | 0 | 0.00% | 5,424 |
| 1787 | 5 | 35 | 282 | 8,887 | 4,119 | 46.35% | 4,768 | 53.65% | 0 | 0.00% | 0 |
| 1801 | 5 | 35 | 336 | 10,385 | 4,757 | 45.81% | 5,626 | 54.17% | 2 | 0.02% | 0 |
| 1803 | 5 | 35 | 916 | 21,159 | 9,846 | 46.53% | 11,297 | 53.39% | 16 | 0.08% | 17,988 |
| 1834 | 5 | 35 | 330 | 9,048 | 4,214 | 46.57% | 4,833 | 53.42% | 1 | 0.01% | 0 |
| 1835 | 5 | 35 | 513 | 1,795 | 771 | 42.95% | 1,016 | 56.60% | 8 | 0.45% | 1,718 |
| 1840 | 5 | 35 | 991 | 10,214 | 4,814 | 47.13% | 5,396 | 52.83% | 4 | 0.04% | 0 |
| 1845 | 5 | 35 | 798 | 27,693 | 13,274 | 47.93% | 14,047 | 50.72% | 372 | 1.34% | 7,239 |
| 1850 | 5 | 35 | 422 | 11,805 | 5,665 | 47.99% | 6,137 | 51.99% | 3 | 0.03% | 1,313 |
| 1855 | 5 | 35 | 752 | 9,701 | 4,567 | 47.08% | 5,131 | 52.89% | 3 | 0.03% | 1,670 |
| 1860 | 5 | 35 | 1,002 | 33,117 | 16,062 | 48.50% | 17,018 | 51.39% | 37 | 0.11% | 6,106 |
| 1890 | 5 | 35 | 494 | 1 | 0 | 0.00% | 1 | 100.00% | 0 | 0.00% | |
| 1921 | 5 | 35 | 6,082 | 296 | 120 | 40.54% | 138 | 46.62% | 38 | 12.84% | 0 |
| 1925 | 5 | 35 | 7,498 | 1,124 | 581 | 51.69% | 531 | 47.24% | 12 | 1.07% | 0 |
| 1930 | 5 | 35 | 7,221 | 37 | 22 | 59.46% | 14 | 37.84% | 1 | 2.70% | 0 |
| 1940 | 5 | 35 | 21,309 | 82 | 45 | 54.88% | 33 | 40.24% | 4 | 4.88% | 0 |
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