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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 | 33,554 | 48.98% | 34,950 | 51.01% | 8 | 0.01% | 591 |
| 1850 | 7 | 95 | 2,290 | 71,559 | 35,083 | 49.03% | 36,421 | 50.90% | 55 | 0.08% | 0 |
| 1855 | 7 | 95 | 3,560 | 76,000 | 37,138 | 48.87% | 38,811 | 51.07% | 51 | 0.07% | 0 |
| 1860 | 7 | 95 | 1,813 | 84,446 | 41,772 | 49.47% | 42,653 | 50.51% | 21 | 0.02% | 0 |
| 1870 | 7 | 95 | 6,555 | 93,089 | 46,238 | 49.67% | 46,851 | 50.33% | 0 | 0.00% | 3,409 |
| 1880 | 7 | 95 | 9,068 | 102,387 | 50,907 | 49.72% | 51,476 | 50.28% | 4 | 0.00% | 43,063 |
| 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 | 119,830 | 59,482 | 49.64% | 60,274 | 50.30% | 74 | 0.06% | 85,644 |
| 1906 | 7 | 95 | 16,306 | 39,374 | 19,714 | 50.07% | 19,659 | 49.93% | 1 | 0.00% | 0 |
| 1911 | 7 | 95 | 19,131 | 26,442 | 13,319 | 50.37% | 13,114 | 49.60% | 9 | 0.03% | 7,552 |
| 1916 | 7 | 95 | 20,278 | 17,118 | 8,553 | 49.96% | 8,559 | 50.00% | 6 | 0.04% | 5,814 |
| 1921 | 7 | 95 | 16,591 | 73,557 | 36,968 | 50.26% | 36,555 | 49.70% | 34 | 0.05% | 31,217 |
| 1925 | 7 | 95 | 24,948 | 4,427 | 2,260 | 51.05% | 2,163 | 48.86% | 4 | 0.09% | 1,265 |
| 1930 | 7 | 95 | 28,249 | 25,390 | 13,059 | 51.43% | 12,330 | 48.56% | 1 | 0.00% | 6,413 |
| 1940 | 7 | 95 | 83,249 | 18,165 | 9,359 | 51.52% | 8,806 | 48.48% | 0 | 0.00% | 0 |
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