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Census data for Ålborg Købstad
| 1787 | 167 | 4,898 | 2,403 | 49.06% | 2,461 | 50.24% | 34 | 0.69% | 0 |
| 1801 | 221 | 5,578 | 2,714 | 48.66% | 2,864 | 51.34% | 0 | 0.00% | 0 |
| 1834 | 322 | 7,296 | 3,495 | 47.90% | 3,798 | 52.06% | 3 | 0.04% | 0 |
| 1840 | 208 | 7,220 | 3,354 | 46.45% | 3,857 | 53.42% | 9 | 0.12% | 0 |
| 1845 | 238 | 7,481 | 3,616 | 48.34% | 3,861 | 51.61% | 4 | 0.05% | 23 |
| 1850 | 250 | 7,750 | 3,684 | 47.54% | 4,062 | 52.41% | 4 | 0.05% | 33 |
| 1855 | 2,595 | 9,178 | 4,526 | 49.31% | 4,639 | 50.54% | 13 | 0.14% | 0 |
| 1860 | 938 | 10,077 | 4,924 | 48.86% | 5,132 | 50.93% | 21 | 0.21% | 93 |
| 1870 | 1,868 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1880 | 2,521 | 14,114 | 6,802 | 48.19% | 7,312 | 51.81% | 0 | 0.00% | 0 |
| 1890 | 4,371 | 19,555 | 9,331 | 47.72% | 10,224 | 52.28% | 0 | 0.00% | 0 |
| 1901 | 6,911 | 30,975 | 14,755 | 47.64% | 16,211 | 52.34% | 9 | 0.03% | 29,305 |
| 1906 | 6,543 | 47 | 20 | 42.55% | 27 | 57.45% | 0 | 0.00% | 0 |
| 1911 | 7,385 | 48 | 29 | 60.42% | 13 | 27.08% | 6 | 12.50% | 0 |
| 1916 | 8,725 | 6 | 3 | 50.00% | 3 | 50.00% | 0 | 0.00% | 0 |
| 1921 | 6,593 | 107 | 44 | 41.12% | 57 | 53.27% | 6 | 5.61% | 0 |
| 1925 | 9,393 | 87 | 31 | 35.63% | 40 | 45.98% | 16 | 18.39% | 0 |
| 1930 | 25,895 | 17 | 8 | 47.06% | 7 | 41.18% | 2 | 11.76% | 0 |
| 1940 | 36,081 | 810 | 386 | 47.65% | 423 | 52.22% | 1 | 0.12% | 0 |
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