The baby name Althea appears in baby name data for the United States from 1910 to 2024. It was most popular in 1956 with 449 babies given the name.
In the later years of this period, Althea has become less common than it once was.
| Year | Count |
|---|---|
| 1910 | 45 |
| 1911 | 27 |
| 1912 | 80 |
| 1913 | 70 |
| 1914 | 168 |
| 1915 | 247 |
| 1916 | 254 |
| 1917 | 234 |
| 1918 | 315 |
| 1919 | 245 |
| 1920 | 315 |
| 1921 | 247 |
| 1922 | 203 |
| 1923 | 243 |
| 1924 | 274 |
| 1925 | 257 |
| 1926 | 214 |
| 1927 | 260 |
| 1928 | 161 |
| 1929 | 169 |
| 1930 | 159 |
| 1931 | 130 |
| 1932 | 127 |
| 1933 | 135 |
| 1934 | 105 |
| 1935 | 91 |
| 1936 | 93 |
| 1937 | 97 |
| 1938 | 62 |
| 1939 | 65 |
| 1940 | 46 |
| 1941 | 71 |
| 1942 | 66 |
| 1943 | 71 |
| 1944 | 49 |
| 1945 | 56 |
| 1946 | 85 |
| 1947 | 50 |
| 1948 | 108 |
| 1949 | 227 |
| 1950 | 325 |
| 1951 | 410 |
| 1952 | 397 |
| 1953 | 278 |
| 1954 | 332 |
| 1955 | 261 |
| 1956 | 449 |
| 1957 | 436 |
| 1958 | 302 |
| 1959 | 227 |
| 1960 | 208 |
| 1961 | 158 |
| 1962 | 132 |
| 1963 | 123 |
| 1964 | 128 |
| 1965 | 229 |
| 1966 | 171 |
| 1967 | 228 |
| 1968 | 205 |
| 1969 | 134 |
| 1970 | 124 |
| 1971 | 123 |
| 1972 | 98 |
| 1973 | 41 |
| 1974 | 53 |
| 1975 | 27 |
| 1976 | 23 |
| 1977 | 62 |
| 1978 | 32 |
| 1979 | 26 |
| 1980 | 46 |
| 1981 | 52 |
| 1982 | 18 |
| 1983 | 6 |
| 1984 | 16 |
| 1985 | 9 |
| 1986 | 10 |
| 1987 | 11 |
| 1988 | 17 |
| 1989 | 20 |
| 1990 | 7 |
| 1991 | 7 |
| 1993 | 14 |
| 1994 | 5 |
| 1998 | 5 |
| 1999 | 19 |
| 2000 | 7 |
| 2001 | 12 |
| 2002 | 5 |
| 2003 | 13 |
| 2004 | 10 |
| 2005 | 8 |
| 2006 | 6 |
| 2007 | 5 |
| 2008 | 10 |
| 2009 | 8 |
| 2010 | 12 |
| 2011 | 18 |
| 2012 | 31 |
| 2013 | 47 |
| 2014 | 51 |
| 2015 | 84 |
| 2016 | 104 |
| 2017 | 114 |
| 2018 | 106 |
| 2019 | 151 |
| 2020 | 116 |
| 2021 | 122 |
| 2022 | 135 |
| 2023 | 112 |
| 2024 | 104 |