The baby name Kathleen appears in baby name data for the United States from 1910 to 2024. It was most popular in 1951 with 33,286 babies given the name.
In the later years of this period, Kathleen has become less common than it once was.
| Year | Count |
|---|---|
| 1910 | 829 |
| 1911 | 898 |
| 1912 | 1,217 |
| 1913 | 1,485 |
| 1914 | 1,864 |
| 1915 | 2,493 |
| 1916 | 2,768 |
| 1917 | 3,042 |
| 1918 | 3,428 |
| 1919 | 3,244 |
| 1920 | 3,998 |
| 1921 | 4,305 |
| 1922 | 4,019 |
| 1923 | 4,814 |
| 1924 | 4,634 |
| 1925 | 5,146 |
| 1926 | 4,852 |
| 1927 | 4,867 |
| 1928 | 4,799 |
| 1929 | 4,275 |
| 1930 | 4,487 |
| 1931 | 3,682 |
| 1932 | 3,802 |
| 1933 | 4,118 |
| 1934 | 4,042 |
| 1935 | 4,121 |
| 1935 | 5 |
| 1936 | 4,018 |
| 1937 | 4,481 |
| 1937 | 5 |
| 1938 | 4,878 |
| 1939 | 5,234 |
| 1940 | 6,298 |
| 1940 | 5 |
| 1941 | 7,790 |
| 1941 | 5 |
| 1942 | 11,446 |
| 1942 | 9 |
| 1943 | 13,678 |
| 1944 | 14,091 |
| 1945 | 14,779 |
| 1945 | 7 |
| 1946 | 20,091 |
| 1947 | 25,259 |
| 1947 | 32 |
| 1948 | 26,904 |
| 1948 | 9 |
| 1949 | 30,792 |
| 1949 | 15 |
| 1950 | 31,981 |
| 1950 | 5 |
| 1951 | 33,286 |
| 1951 | 5 |
| 1952 | 32,638 |
| 1952 | 12 |
| 1953 | 29,450 |
| 1953 | 17 |
| 1954 | 25,944 |
| 1954 | 18 |
| 1955 | 25,390 |
| 1955 | 6 |
| 1956 | 24,777 |
| 1956 | 12 |
| 1957 | 21,763 |
| 1957 | 7 |
| 1958 | 23,953 |
| 1958 | 10 |
| 1959 | 22,095 |
| 1959 | 7 |
| 1960 | 20,512 |
| 1961 | 19,571 |
| 1961 | 5 |
| 1962 | 16,150 |
| 1962 | 5 |
| 1963 | 14,530 |
| 1964 | 14,335 |
| 1964 | 5 |
| 1965 | 12,669 |
| 1965 | 11 |
| 1966 | 11,299 |
| 1966 | 12 |
| 1967 | 9,986 |
| 1967 | 9 |
| 1968 | 9,701 |
| 1969 | 9,308 |
| 1969 | 5 |
| 1970 | 8,234 |
| 1970 | 6 |
| 1971 | 6,882 |
| 1972 | 5,662 |
| 1972 | 12 |
| 1973 | 4,698 |
| 1974 | 4,416 |
| 1975 | 4,024 |
| 1976 | 3,847 |
| 1977 | 4,453 |
| 1978 | 4,620 |
| 1979 | 4,490 |
| 1980 | 4,677 |
| 1981 | 4,211 |
| 1982 | 4,246 |
| 1983 | 4,334 |
| 1984 | 4,332 |
| 1985 | 4,550 |
| 1986 | 4,833 |
| 1987 | 5,046 |
| 1988 | 4,744 |
| 1989 | 4,341 |
| 1989 | 15 |
| 1990 | 3,951 |
| 1990 | 5 |
| 1991 | 4,224 |
| 1992 | 3,487 |
| 1993 | 3,142 |
| 1994 | 2,650 |
| 1995 | 2,470 |
| 1996 | 2,291 |
| 1997 | 1,986 |
| 1998 | 2,124 |
| 1999 | 1,697 |
| 2000 | 1,614 |
| 2001 | 1,354 |
| 2002 | 1,228 |
| 2003 | 1,170 |
| 2004 | 1,218 |
| 2005 | 1,171 |
| 2006 | 973 |
| 2007 | 909 |
| 2008 | 719 |
| 2009 | 512 |
| 2010 | 454 |
| 2011 | 437 |
| 2012 | 429 |
| 2013 | 433 |
| 2014 | 389 |
| 2015 | 360 |
| 2016 | 314 |
| 2017 | 351 |
| 2018 | 266 |
| 2019 | 269 |
| 2020 | 244 |
| 2021 | 250 |
| 2022 | 219 |
| 2023 | 271 |
| 2024 | 209 |