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Census data for Hjørring County
| 1717 | 7 | 1 | 21 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1787 | 7 | 92 | 1,658 | 40,823 | 20,188 | 49.45% | 20,628 | 50.53% | 7 | 0.02% | 192 |
| 1801 | 7 | 93 | 1,622 | 45,373 | 22,247 | 49.03% | 23,121 | 50.96% | 5 | 0.01% | 0 |
| 1834 | 7 | 94 | 1,980 | 62,158 | 30,489 | 49.05% | 31,664 | 50.94% | 5 | 0.01% | 0 |
| 1840 | 7 | 94 | 1,827 | 61,359 | 30,322 | 49.42% | 31,028 | 50.57% | 9 | 0.01% | 434 |
| 1845 | 7 | 94 | 2,376 | 68,512 | 33,553 | 48.97% | 34,951 | 51.01% | 8 | 0.01% | 591 |
| 1850 | 7 | 95 | 2,290 | 71,559 | 35,085 | 49.03% | 36,421 | 50.90% | 53 | 0.07% | 0 |
| 1855 | 7 | 95 | 3,544 | 76,000 | 37,139 | 48.87% | 38,814 | 51.07% | 47 | 0.06% | 0 |
| 1860 | 7 | 95 | 1,813 | 84,446 | 41,773 | 49.47% | 42,652 | 50.51% | 21 | 0.02% | 0 |
| 1870 | 7 | 95 | 6,555 | 93,097 | 46,242 | 49.67% | 46,855 | 50.33% | 0 | 0.00% | 982 |
| 1880 | 7 | 95 | 9,067 | 102,386 | 50,907 | 49.72% | 51,476 | 50.28% | 3 | 0.00% | 42,158 |
| 1890 | 7 | 95 | 12,058 | 111,420 | 55,351 | 49.68% | 56,067 | 50.32% | 2 | 0.00% | 43,432 |
| 1901 | 7 | 95 | 65,799 | 119,819 | 59,477 | 49.64% | 60,268 | 50.30% | 74 | 0.06% | 84,437 |
| 1906 | 7 | 95 | 16,306 | 39,382 | 19,717 | 50.07% | 19,664 | 49.93% | 1 | 0.00% | 0 |
| 1911 | 7 | 95 | 19,131 | 26,401 | 13,294 | 50.35% | 13,098 | 49.61% | 9 | 0.03% | 7,180 |
| 1916 | 7 | 95 | 20,278 | 17,147 | 8,568 | 49.97% | 8,573 | 50.00% | 6 | 0.03% | 5,814 |
| 1921 | 7 | 95 | 16,591 | 73,560 | 36,961 | 50.25% | 36,566 | 49.71% | 33 | 0.04% | 29,459 |
| 1925 | 7 | 95 | 24,948 | 4,424 | 2,258 | 51.04% | 2,165 | 48.94% | 1 | 0.02% | 1,265 |
| 1930 | 7 | 95 | 28,249 | 25,390 | 13,058 | 51.43% | 12,331 | 48.57% | 1 | 0.00% | 6,393 |
| 1940 | 7 | 95 | 83,249 | 20,343 | 10,455 | 51.39% | 9,888 | 48.61% | 0 | 0.00% | 0 |
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