Leith is a rare variant of Letha that peaked in 2018 and has grown less common since.
Leith is predominantly a boy name. In 2025 it ranked #7,998 for boy births in the United States (and #16,686 across all names), given to 10 babies. Leith first appears in 1916 and peaked in 2018 (23 births).
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2025 | 10 | 10 | — | #7,998 |
| 2024 | 8 | 8 | — | #9,510 |
| 2023 | 14 | 14 | — | #6,379 |
| 2022 | 15 | 15 | — | #6,031 |
| 2021 | 16 | 16 | — | #5,687 |
| 2020 | 12 | 12 | — | #6,861 |
| 2019 | 12 | 12 | — | #7,015 |
| 2018 | 23 | 23 | — | #4,433 |
| 2017 | 17 | 17 | — | #5,433 |
| 2016 | 12 | 12 | — | #6,974 |
| 2015 | 10 | 10 | — | #7,822 |
| 2013 | 12 | 12 | — | #6,865 |
| 2012 | 6 | 6 | — | #11,676 |
| 2011 | 7 | 7 | — | #10,319 |
| 2010 | 7 | 7 | — | #10,322 |
| 2009 | 8 | 8 | — | #9,530 |
| 2008 | 6 | 6 | — | #11,974 |
| 2007 | 5 | 5 | — | #13,582 |
| 2006 | 13 | 13 | — | #6,321 |
| 2005 | 17 | 17 | — | #4,948 |
| 2004 | 8 | 8 | — | #8,613 |
| 2003 | 12 | 12 | — | #6,101 |
| 2002 | 5 | 5 | — | #11,758 |
| 2001 | 6 | 6 | — | #10,032 |
| 1999 | 11 | 11 | — | #5,890 |
| 1998 | 6 | 6 | — | #9,167 |
| 1997 | 11 | — | — | #5,506 |
| 1996 | 9 | — | — | #6,304 |
| 1995 | 5 | — | — | #9,720 |
| 1994 | 6 | — | — | #8,376 |
| 1993 | 9 | — | — | #6,036 |
| 1992 | 11 | — | — | #5,106 |
| 1991 | 8 | — | — | #6,284 |
| 1990 | 6 | — | — | #7,713 |
| 1989 | 12 | — | — | #4,424 |
| 1987 | 6 | — | — | #6,610 |
| 1986 | 5 | — | — | #7,368 |
| 1985 | 7 | — | — | #5,502 |
| 1984 | 9 | — | — | #4,412 |
| 1983 | 11 | — | — | #3,772 |
| 1982 | 6 | — | — | #6,084 |
| 1981 | 16 | — | — | #2,844 |
| 1980 | 13 | — | — | #3,359 |
| 1979 | 13 | — | — | #3,276 |
| 1978 | 8 | — | — | #4,398 |
| 1977 | 11 | — | — | #3,502 |
| 1976 | 5 | — | — | #6,112 |
| 1975 | 7 | — | — | #4,595 |
| 1974 | 10 | — | — | #3,463 |
| 1973 | 14 | — | #5,816 | #5,554 |
| 1972 | 7 | — | — | #4,252 |
| 1971 | 19 | — | #9,003 | #2,640 |
| 1970 | 16 | — | #7,560 | #3,189 |
| 1969 | 12 | — | — | #2,628 |
| 1967 | 16 | — | #4,810 | #3,429 |
| 1966 | 8 | — | — | #3,140 |
| 1965 | 16 | — | #5,083 | #3,132 |
| 1964 | 9 | — | — | #2,974 |
| 1962 | 16 | — | #6,233 | #2,776 |
| 1961 | 13 | — | #5,099 | #4,404 |
| 1960 | 6 | — | #6,060 | — |
| 1959 | 14 | — | #6,786 | #2,957 |
| 1958 | 8 | — | #4,721 | — |
| 1957 | 12 | — | #6,612 | #3,426 |
| 1956 | 11 | — | #6,465 | #3,760 |
| 1955 | 8 | — | — | #3,105 |
| 1953 | 6 | — | #5,387 | — |
| 1951 | 6 | — | #5,160 | — |
| 1949 | 5 | — | #5,661 | — |
| 1947 | 7 | — | — | #3,246 |
| 1943 | 7 | — | #4,013 | — |
| 1941 | 6 | — | #4,206 | — |
| 1939 | 5 | — | — | #3,758 |
| 1935 | 6 | — | — | #3,469 |
| 1927 | 5 | — | — | #4,528 |
| 1924 | 10 | — | — | #2,935 |
| 1922 | 7 | — | — | #3,714 |
| 1917 | 5 | — | — | #4,309 |
| 1916 | 7 | — | — | #3,363 |