The baby name Kay appears in baby name data for the United States from 1910 to 2024. It was most popular in 1943 with 4,838 babies given the name.
In the later years of this period, Kay has become less common than it once was.
| Year | Count |
|---|---|
| 1910 | 77 |
| 1911 | 70 |
| 1912 | 78 |
| 1913 | 85 |
| 1914 | 223 |
| 1915 | 223 |
| 1916 | 242 |
| 1916 | 32 |
| 1917 | 256 |
| 1918 | 297 |
| 1918 | 8 |
| 1919 | 330 |
| 1919 | 6 |
| 1920 | 265 |
| 1920 | 19 |
| 1921 | 275 |
| 1921 | 17 |
| 1922 | 267 |
| 1922 | 12 |
| 1923 | 360 |
| 1923 | 13 |
| 1924 | 362 |
| 1924 | 25 |
| 1925 | 273 |
| 1925 | 13 |
| 1926 | 218 |
| 1926 | 16 |
| 1927 | 292 |
| 1927 | 74 |
| 1928 | 251 |
| 1928 | 58 |
| 1929 | 259 |
| 1929 | 50 |
| 1930 | 427 |
| 1930 | 80 |
| 1931 | 703 |
| 1931 | 80 |
| 1932 | 838 |
| 1932 | 104 |
| 1933 | 1,181 |
| 1933 | 116 |
| 1934 | 1,922 |
| 1934 | 164 |
| 1935 | 2,338 |
| 1935 | 162 |
| 1936 | 3,203 |
| 1936 | 149 |
| 1937 | 4,144 |
| 1937 | 100 |
| 1938 | 4,201 |
| 1938 | 75 |
| 1939 | 4,065 |
| 1939 | 100 |
| 1940 | 3,971 |
| 1940 | 134 |
| 1941 | 4,373 |
| 1941 | 93 |
| 1942 | 4,140 |
| 1942 | 78 |
| 1943 | 4,838 |
| 1943 | 44 |
| 1944 | 3,665 |
| 1944 | 32 |
| 1945 | 3,452 |
| 1945 | 34 |
| 1946 | 3,819 |
| 1946 | 15 |
| 1947 | 4,327 |
| 1947 | 22 |
| 1948 | 3,495 |
| 1948 | 18 |
| 1949 | 3,374 |
| 1949 | 12 |
| 1950 | 3,519 |
| 1950 | 19 |
| 1951 | 4,031 |
| 1951 | 14 |
| 1952 | 3,725 |
| 1952 | 16 |
| 1953 | 3,346 |
| 1953 | 22 |
| 1954 | 3,336 |
| 1954 | 14 |
| 1955 | 3,011 |
| 1955 | 22 |
| 1956 | 3,152 |
| 1956 | 18 |
| 1957 | 2,955 |
| 1957 | 12 |
| 1958 | 2,790 |
| 1958 | 6 |
| 1959 | 2,594 |
| 1959 | 9 |
| 1960 | 2,550 |
| 1960 | 6 |
| 1961 | 2,483 |
| 1962 | 2,738 |
| 1962 | 5 |
| 1963 | 1,846 |
| 1964 | 1,590 |
| 1965 | 1,166 |
| 1966 | 972 |
| 1967 | 850 |
| 1968 | 791 |
| 1969 | 624 |
| 1970 | 573 |
| 1971 | 399 |
| 1972 | 239 |
| 1973 | 275 |
| 1974 | 277 |
| 1975 | 154 |
| 1976 | 152 |
| 1977 | 152 |
| 1978 | 94 |
| 1979 | 119 |
| 1980 | 67 |
| 1981 | 116 |
| 1982 | 111 |
| 1983 | 83 |
| 1984 | 139 |
| 1985 | 142 |
| 1986 | 92 |
| 1987 | 86 |
| 1988 | 103 |
| 1989 | 33 |
| 1990 | 61 |
| 1991 | 27 |
| 1992 | 41 |
| 1993 | 56 |
| 1994 | 52 |
| 1995 | 28 |
| 1996 | 12 |
| 1997 | 30 |
| 1998 | 5 |
| 1999 | 8 |
| 2000 | 5 |
| 2001 | 17 |
| 2002 | 5 |
| 2003 | 17 |
| 2004 | 32 |
| 2006 | 14 |
| 2007 | 53 |
| 2008 | 7 |
| 2010 | 5 |
| 2011 | 6 |
| 2015 | 21 |
| 2016 | 15 |
| 2017 | 5 |
| 2018 | 19 |
| 2021 | 8 |
| 2022 | 9 |
| 2024 | 5 |