Census data for Haderslev Købstad
| 1803 | 74 | 2,694 | 1,291 | 47.92% | 1,398 | 51.89% | 5 | 0.19% | 0 |
| 1834 | 0 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1835 | 201 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1840 | 154 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1845 | 125 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1850 | 0 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1855 | 0 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1860 | 1,472 | 8,007 | 3,921 | 48.97% | 4,083 | 50.99% | 3 | 0.04% | 8 |
| 1870 | 0 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1880 | 0 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1890 | 0 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1901 | 0 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1906 | 0 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1911 | 0 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1916 | 0 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1921 | 3,067 | 13,389 | 6,344 | 47.38% | 7,044 | 52.61% | 1 | 0.01% | 14 |
| 1925 | 5,042 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1930 | 8,796 | 1 | 1 | 100.00% | 0 | 0.00% | 0 | 0.00% | |
| 1940 | 10,098 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |