Alethea is an uncommon variant of Althea that peaked in 1973 and has since faded.
Alethea is a girl name. In 2025 it ranked #3,030 for girl births in the United States (and #5,341 across all names), given to 54 babies. Alethea was first reported in SSA data in 1892 and peaked in 1973 (322 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2025 | 54 | 54 | #3,030 |
| 2024 | 65 | 65 | #2,661 |
| 2023 | 74 | 74 | #2,415 |
| 2022 | 80 | 80 | #2,320 |
| 2021 | 81 | 81 | #2,268 |
| 2020 | 62 | 62 | #2,683 |
| 2019 | 51 | 51 | #3,131 |
| 2018 | 29 | 29 | #4,669 |
| 2017 | 50 | 50 | #3,192 |
| 2016 | 28 | 28 | #4,858 |
| 2015 | 40 | 40 | #3,772 |
| 2014 | 36 | 36 | #4,107 |
| 2013 | 40 | 40 | #3,785 |
| 2012 | 28 | 28 | #4,969 |
| 2011 | 33 | 33 | #4,361 |
| 2010 | 25 | 25 | #5,424 |
| 2009 | 26 | 26 | #5,387 |
| 2008 | 28 | 28 | #5,150 |
| 2007 | 34 | 34 | #4,384 |
| 2006 | 26 | 26 | #5,242 |
| 2005 | 27 | 27 | #4,834 |
| 2004 | 34 | 34 | #4,094 |
| 2003 | 38 | 38 | #3,660 |
| 2002 | 26 | 26 | #4,634 |
| 2001 | 34 | 34 | #3,788 |
| 2000 | 31 | 31 | #3,984 |
| 1999 | 23 | 23 | #4,721 |
| 1998 | 22 | 22 | #4,801 |
| 1997 | 24 | — | #4,376 |
| 1996 | 21 | — | #4,742 |
| 1995 | 25 | — | #4,101 |
| 1994 | 36 | — | #3,169 |
| 1993 | 26 | — | #3,989 |
| 1992 | 34 | — | #3,267 |
| 1991 | 34 | — | #3,208 |
| 1990 | 41 | — | #2,800 |
| 1989 | 48 | — | #2,409 |
| 1988 | 36 | — | #2,868 |
| 1987 | 54 | — | #2,044 |
| 1986 | 31 | — | #2,974 |
| 1985 | 43 | — | #2,317 |
| 1984 | 42 | — | #2,300 |
| 1983 | 54 | — | #1,907 |
| 1982 | 77 | — | #1,532 |
| 1981 | 72 | — | #1,615 |
| 1980 | 76 | — | #1,542 |
| 1979 | 68 | — | #1,645 |
| 1978 | 88 | — | #1,347 |
| 1977 | 79 | — | #1,414 |
| 1976 | 99 | — | #1,161 |
| 1975 | 101 | — | #1,145 |
| 1974 | 201 | — | #716 |
| 1973 | 322 | — | #522 |
| 1972 | 66 | — | #1,457 |
| 1971 | 104 | — | #1,125 |
| 1970 | 87 | — | #1,263 |
| 1969 | 75 | — | #1,303 |
| 1968 | 99 | — | #1,056 |
| 1967 | 52 | — | #1,560 |
| 1966 | 42 | — | #1,736 |
| 1965 | 65 | — | #1,366 |
| 1964 | 51 | — | #1,593 |
| 1963 | 67 | — | #1,352 |
| 1962 | 74 | — | #1,283 |
| 1961 | 71 | — | #1,319 |
| 1960 | 84 | — | #1,188 |
| 1959 | 59 | — | #1,396 |
| 1958 | 45 | — | #1,588 |
| 1957 | 46 | — | #1,590 |
| 1956 | 56 | — | #1,398 |
| 1955 | 58 | — | #1,320 |
| 1954 | 47 | — | #1,465 |
| 1953 | 37 | — | #1,623 |
| 1952 | 43 | — | #1,469 |
| 1951 | 39 | — | #1,505 |
| 1950 | 34 | — | #1,602 |
| 1949 | 26 | — | #1,883 |
| 1948 | 26 | — | #1,859 |
| 1947 | 15 | — | #2,639 |
| 1946 | 14 | — | #2,600 |
| 1945 | 12 | — | #2,602 |
| 1944 | 21 | — | #1,869 |
| 1943 | 14 | — | #2,448 |
| 1942 | 20 | — | #1,918 |
| 1941 | 11 | — | #2,669 |
| 1940 | 13 | — | #2,299 |
| 1939 | 10 | — | #2,743 |
| 1938 | 13 | — | #2,341 |
| 1937 | 14 | — | #2,197 |
| 1936 | 11 | — | #2,521 |
| 1935 | 10 | — | #2,736 |
| 1934 | 6 | — | #3,810 |
| 1933 | 19 | — | #1,775 |
| 1932 | 7 | — | #3,575 |
| 1931 | 8 | — | #3,231 |
| 1930 | 10 | — | #2,846 |
| 1929 | 8 | — | #3,398 |
| 1928 | 21 | — | #1,843 |
| 1927 | 11 | — | #2,863 |
| 1926 | 25 | — | #1,668 |
| 1925 | 17 | — | #2,195 |
| 1924 | 26 | — | #1,679 |
| 1923 | 17 | — | #2,173 |
| 1922 | 33 | — | #1,404 |
| 1921 | 23 | — | #1,822 |
| 1920 | 33 | — | #1,377 |
| 1919 | 18 | — | #1,990 |
| 1918 | 15 | — | #2,290 |
| 1917 | 21 | — | #1,708 |
| 1916 | 23 | — | #1,581 |
| 1915 | 22 | — | #1,571 |
| 1914 | 13 | — | #1,899 |
| 1913 | 16 | — | #1,467 |
| 1912 | 10 | — | #1,848 |
| 1911 | 7 | — | #1,961 |
| 1910 | 9 | — | #1,637 |
| 1909 | 7 | — | #1,768 |
| 1908 | 6 | — | #1,869 |
| 1907 | 6 | — | #1,831 |
| 1904 | 6 | — | #1,662 |
| 1903 | 6 | — | #1,599 |
| 1902 | 6 | — | #1,599 |
| 1899 | 5 | — | #1,605 |
| 1897 | 5 | — | #1,558 |
| 1896 | 5 | — | #1,589 |
| 1893 | 5 | — | #1,444 |
| 1892 | 5 | — | #1,455 |