Duncan is an established boys' name that peaked in 1997 and has grown less common since.
Duncan is predominantly a boy name. In 2025 it ranked #1,124 for boy births in the United States (and #2,290 across all names), given to 190 babies. Duncan was first reported in SSA data in 1880 and peaked in 1997 (644 births).
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2025 | 190 | 190 | — | #1,124 |
| 2024 | 195 | 195 | — | #1,104 |
| 2023 | 244 | 244 | — | #930 |
| 2022 | 253 | 253 | — | #915 |
| 2021 | 216 | 216 | — | #1,018 |
| 2020 | 217 | 217 | — | #982 |
| 2019 | 205 | 205 | — | #1,014 |
| 2018 | 235 | 235 | — | #917 |
| 2017 | 251 | 251 | — | #869 |
| 2016 | 286 | 286 | — | #806 |
| 2015 | 299 | 299 | #17,192 | #790 |
| 2014 | 287 | 287 | — | #801 |
| 2013 | 262 | 262 | — | #823 |
| 2012 | 263 | 263 | — | #831 |
| 2011 | 275 | 275 | — | #801 |
| 2010 | 329 | 329 | — | #709 |
| 2009 | 318 | 318 | — | #735 |
| 2008 | 324 | 324 | — | #716 |
| 2007 | 288 | 288 | — | #765 |
| 2006 | 351 | 351 | — | #656 |
| 2005 | 359 | 359 | — | #619 |
| 2004 | 402 | 402 | — | #567 |
| 2003 | 421 | 421 | — | #543 |
| 2002 | 472 | 472 | — | #487 |
| 2001 | 500 | 500 | — | #474 |
| 2000 | 530 | 530 | — | #447 |
| 1999 | 576 | 576 | — | #410 |
| 1998 | 641 | 641 | — | #386 |
| 1997 | 644 | — | — | #378 |
| 1996 | 511 | — | #12,286 | #444 |
| 1995 | 456 | — | — | #473 |
| 1994 | 388 | — | — | #512 |
| 1993 | 326 | — | — | #567 |
| 1992 | 260 | — | — | #639 |
| 1991 | 235 | — | — | #661 |
| 1990 | 190 | — | — | #740 |
| 1989 | 208 | — | — | #690 |
| 1988 | 170 | — | — | #721 |
| 1987 | 163 | — | — | #715 |
| 1986 | 162 | — | — | #712 |
| 1985 | 164 | — | — | #690 |
| 1984 | 137 | — | — | #746 |
| 1983 | 132 | — | — | #753 |
| 1982 | 94 | — | — | #922 |
| 1981 | 85 | — | — | #980 |
| 1980 | 99 | — | — | #901 |
| 1979 | 85 | — | — | #961 |
| 1978 | 85 | — | — | #940 |
| 1977 | 76 | — | — | #984 |
| 1976 | 83 | — | — | #915 |
| 1975 | 85 | — | — | #896 |
| 1974 | 85 | — | — | #871 |
| 1973 | 121 | — | — | #728 |
| 1972 | 84 | — | — | #879 |
| 1971 | 95 | — | — | #829 |
| 1970 | 134 | — | — | #713 |
| 1969 | 97 | — | — | #785 |
| 1968 | 98 | — | — | #749 |
| 1967 | 84 | — | — | #795 |
| 1966 | 106 | — | — | #722 |
| 1965 | 126 | — | — | #661 |
| 1964 | 154 | — | — | #626 |
| 1963 | 263 | — | — | #493 |
| 1962 | 142 | — | — | #649 |
| 1961 | 145 | — | — | #651 |
| 1960 | 174 | — | — | #595 |
| 1959 | 253 | — | — | #490 |
| 1958 | 281 | — | — | #472 |
| 1957 | 208 | — | — | #537 |
| 1956 | 178 | — | — | #568 |
| 1955 | 145 | — | — | #616 |
| 1954 | 157 | — | — | #589 |
| 1953 | 149 | — | — | #590 |
| 1952 | 141 | — | — | #589 |
| 1951 | 138 | — | — | #591 |
| 1950 | 133 | — | — | #590 |
| 1949 | 140 | — | — | #568 |
| 1948 | 133 | — | — | #579 |
| 1947 | 158 | — | — | #538 |
| 1946 | 120 | — | — | #586 |
| 1945 | 114 | — | — | #563 |
| 1944 | 102 | — | — | #612 |
| 1943 | 106 | — | — | #613 |
| 1942 | 117 | — | — | #572 |
| 1941 | 101 | — | — | #590 |
| 1940 | 87 | — | — | #643 |
| 1939 | 67 | — | — | #734 |
| 1938 | 69 | — | — | #738 |
| 1937 | 71 | — | — | #716 |
| 1936 | 68 | — | — | #732 |
| 1935 | 67 | — | — | #753 |
| 1934 | 53 | — | — | #866 |
| 1933 | 61 | — | — | #786 |
| 1932 | 66 | — | — | #781 |
| 1931 | 64 | — | — | #785 |
| 1930 | 67 | — | — | #786 |
| 1929 | 71 | — | — | #757 |
| 1928 | 89 | — | — | #665 |
| 1927 | 57 | — | — | #899 |
| 1926 | 72 | — | — | #759 |
| 1925 | 86 | — | — | #698 |
| 1924 | 77 | — | — | #763 |
| 1923 | 72 | — | — | #779 |
| 1922 | 82 | — | — | #723 |
| 1921 | 75 | — | — | #775 |
| 1920 | 86 | — | — | #696 |
| 1919 | 72 | — | — | #762 |
| 1918 | 81 | — | — | #703 |
| 1917 | 68 | — | — | #762 |
| 1916 | 66 | — | — | #754 |
| 1915 | 70 | — | — | #701 |
| 1914 | 53 | — | — | #716 |
| 1913 | 47 | — | — | #653 |
| 1912 | 46 | — | — | #601 |
| 1911 | 25 | — | — | #614 |
| 1910 | 14 | — | — | #830 |
| 1908 | 14 | — | — | #720 |
| 1907 | 12 | — | — | #782 |
| 1906 | 11 | — | — | #771 |
| 1905 | 12 | — | — | #713 |
| 1904 | 16 | — | — | #572 |
| 1903 | 16 | — | — | #557 |
| 1902 | 11 | — | — | #700 |
| 1901 | 7 | — | — | #881 |
| 1900 | 17 | — | — | #607 |
| 1899 | 10 | — | — | #672 |
| 1898 | 13 | — | — | #616 |
| 1897 | 8 | — | — | #804 |
| 1896 | 14 | — | — | #559 |
| 1895 | 14 | — | — | #562 |
| 1894 | 10 | — | — | #685 |
| 1893 | 10 | — | — | #668 |
| 1892 | 19 | — | — | #448 |
| 1891 | 10 | — | — | #612 |
| 1890 | 9 | — | — | #684 |
| 1889 | 16 | — | — | #468 |
| 1888 | 15 | — | — | #511 |
| 1887 | 18 | — | — | #396 |
| 1886 | 12 | — | — | #552 |
| 1885 | 14 | — | — | #507 |
| 1884 | 10 | — | — | #626 |
| 1883 | 18 | — | — | #416 |
| 1882 | 12 | — | — | #550 |
| 1881 | 12 | — | — | #511 |
| 1880 | 12 | — | — | #540 |