Leoncio is a rare boys' name that peaked in 2007 and has grown less common since.
Leoncio is a boy name. In 2025 it ranked #7,470 for boy births in the United States (and #15,669 across all names), given to 11 babies. Leoncio first appears in 1951 and peaked in 2007 (16 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2025 | 11 | 11 | #7,470 |
| 2024 | 8 | 8 | #9,513 |
| 2023 | 7 | 7 | #10,349 |
| 2022 | 8 | 8 | #9,502 |
| 2021 | 8 | 8 | #9,343 |
| 2020 | 5 | 5 | #13,279 |
| 2019 | 5 | 5 | #13,330 |
| 2018 | 10 | 10 | #7,937 |
| 2017 | 7 | 7 | #10,342 |
| 2015 | 7 | 7 | #10,201 |
| 2014 | 9 | 9 | #8,531 |
| 2013 | 7 | 7 | #10,302 |
| 2012 | 11 | 11 | #7,347 |
| 2010 | 7 | 7 | #10,325 |
| 2009 | 10 | 10 | #8,063 |
| 2008 | 9 | 9 | #8,727 |
| 2007 | 16 | 16 | #5,581 |
| 2006 | 12 | 12 | #6,733 |
| 2005 | 8 | 8 | #8,782 |
| 2004 | 14 | 14 | #5,675 |
| 2003 | 11 | 11 | #6,543 |
| 2002 | 7 | 7 | #9,018 |
| 2001 | 9 | 9 | #7,269 |
| 2000 | 13 | 13 | #5,471 |
| 1999 | 8 | 8 | #7,575 |
| 1998 | 10 | 10 | #6,121 |
| 1997 | 11 | — | #5,508 |
| 1996 | 11 | — | #5,395 |
| 1995 | 5 | — | #9,723 |
| 1994 | 13 | — | #4,694 |
| 1993 | 10 | — | #5,624 |
| 1992 | 8 | — | #6,458 |
| 1991 | 14 | — | #4,142 |
| 1990 | 8 | — | #6,179 |
| 1989 | 14 | — | #3,930 |
| 1988 | 7 | — | #6,178 |
| 1987 | 7 | — | #5,843 |
| 1986 | 6 | — | #6,395 |
| 1985 | 12 | — | #3,713 |
| 1984 | 11 | — | #3,830 |
| 1983 | 7 | — | #5,246 |
| 1982 | 14 | — | #3,214 |
| 1981 | 11 | — | #3,757 |
| 1980 | 9 | — | #4,357 |
| 1979 | 10 | — | #3,968 |
| 1978 | 11 | — | #3,527 |
| 1977 | 7 | — | #4,914 |
| 1976 | 9 | — | #3,883 |
| 1972 | 5 | — | #5,437 |
| 1970 | 8 | — | #3,703 |
| 1969 | 7 | — | #3,794 |
| 1966 | 5 | — | #4,293 |
| 1965 | 9 | — | #2,904 |
| 1961 | 6 | — | #3,883 |
| 1960 | 6 | — | #3,887 |
| 1959 | 7 | — | #3,462 |
| 1958 | 5 | — | #4,281 |
| 1957 | 8 | — | #3,157 |
| 1951 | 5 | — | #4,023 |