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Census data for Frederiksborg County
| 1769 | 6 | 1 | 0 | 1,266 | 609 | 48.10% | 657 | 51.90% | 0 | 0.00% | 1,266 |
| 1787 | 6 | 66 | 1,363 | 41,867 | 21,186 | 50.60% | 20,679 | 49.39% | 2 | 0.00% | 0 |
| 1801 | 6 | 68 | 1,788 | 47,297 | 23,979 | 50.70% | 23,297 | 49.26% | 21 | 0.04% | 0 |
| 1834 | 6 | 68 | 1,935 | 66,950 | 33,687 | 50.32% | 33,259 | 49.68% | 4 | 0.01% | 299 |
| 1840 | 6 | 69 | 1,907 | 69,955 | 35,261 | 50.41% | 34,683 | 49.58% | 11 | 0.02% | 0 |
| 1845 | 6 | 69 | 2,339 | 73,587 | 36,084 | 49.04% | 37,473 | 50.92% | 30 | 0.04% | 1,055 |
| 1850 | 6 | 69 | 2,399 | 74,939 | 36,718 | 49.00% | 38,170 | 50.93% | 51 | 0.07% | 0 |
| 1855 | 6 | 69 | 3,338 | 30,250 | 14,874 | 49.17% | 15,352 | 50.75% | 24 | 0.08% | 1,991 |
| 1860 | 6 | 69 | 1,852 | 79,442 | 39,436 | 49.64% | 39,998 | 50.35% | 8 | 0.01% | 0 |
| 1870 | 6 | 69 | 5,910 | 82,328 | 40,671 | 49.40% | 41,638 | 50.58% | 19 | 0.02% | 57,282 |
| 1880 | 6 | 69 | 7,914 | 83,010 | 41,090 | 49.50% | 41,898 | 50.47% | 22 | 0.03% | 4,533 |
| 1890 | 6 | 69 | 9,605 | 85,079 | 41,953 | 49.31% | 43,125 | 50.69% | 1 | 0.00% | 6,185 |
| 1901 | 6 | 69 | 46,915 | 90,645 | 44,739 | 49.36% | 45,902 | 50.64% | 4 | 0.00% | 60,818 |
| 1906 | 6 | 69 | 12,157 | 50,596 | 25,251 | 49.91% | 25,331 | 50.07% | 14 | 0.03% | 17,358 |
| 1911 | 6 | 69 | 14,457 | 11,645 | 5,775 | 49.59% | 5,859 | 50.31% | 11 | 0.09% | 4,286 |
| 1916 | 6 | 69 | 15,418 | 17,090 | 8,629 | 50.49% | 8,460 | 49.50% | 1 | 0.01% | 2,173 |
| 1921 | 6 | 69 | 12,821 | 10,999 | 5,602 | 50.93% | 5,390 | 49.00% | 7 | 0.06% | 2,863 |
| 1925 | 6 | 69 | 20,651 | 11,361 | 5,860 | 51.58% | 5,479 | 48.23% | 22 | 0.19% | 3,746 |
| 1930 | 6 | 69 | 24,093 | 31,173 | 15,758 | 50.55% | 15,402 | 49.41% | 13 | 0.04% | 11,831 |
| 1940 | 6 | 69 | 101,405 | 8,845 | 4,642 | 52.48% | 4,201 | 47.50% | 2 | 0.02% | 0 |
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