Alejo is a rare boys' name that peaked in 2025 and remains in steady use.
Alejo is a boy name. In 2025 it ranked #4,544 for boy births in the United States (and #9,663 across all names), given to 22 babies. Alejo first appears in 1909 and peaked in 2025 (22 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2025 | 22 | 22 | #4,544 |
| 2024 | 10 | 10 | #7,792 |
| 2023 | 13 | 13 | #6,538 |
| 2022 | 12 | 12 | #6,842 |
| 2021 | 17 | 17 | #5,350 |
| 2020 | 13 | 13 | #6,307 |
| 2019 | 10 | 10 | #7,667 |
| 2018 | 12 | 12 | #6,716 |
| 2017 | 10 | 10 | #7,571 |
| 2016 | 7 | 7 | #9,710 |
| 2015 | 16 | 16 | #5,518 |
| 2014 | 11 | 11 | #7,070 |
| 2013 | 15 | 15 | #5,667 |
| 2012 | 9 | 9 | #8,182 |
| 2011 | 13 | 13 | #6,267 |
| 2010 | 5 | 5 | #12,309 |
| 2009 | 9 | 9 | #8,327 |
| 2008 | 12 | 12 | #6,779 |
| 2007 | 16 | 16 | #5,440 |
| 2006 | 10 | 10 | #7,444 |
| 2005 | 14 | 14 | #5,584 |
| 2004 | 14 | 14 | #5,501 |
| 2003 | 14 | 14 | #5,278 |
| 2002 | 12 | 12 | #5,741 |
| 2001 | 14 | 14 | #5,148 |
| 2000 | 10 | 10 | #6,332 |
| 1999 | 13 | 13 | #5,046 |
| 1998 | 8 | 8 | #6,862 |
| 1997 | 13 | — | #4,674 |
| 1996 | 17 | — | #3,835 |
| 1995 | 7 | — | #7,006 |
| 1994 | 10 | — | #5,460 |
| 1993 | 13 | — | #4,453 |
| 1992 | 13 | — | #4,330 |
| 1991 | 10 | — | #5,106 |
| 1990 | 6 | — | #7,200 |
| 1989 | 12 | — | #4,275 |
| 1988 | 9 | — | #4,794 |
| 1987 | 9 | — | #4,583 |
| 1986 | 9 | — | #4,467 |
| 1985 | 7 | — | #5,166 |
| 1984 | 9 | — | #4,220 |
| 1983 | 9 | — | #4,146 |
| 1982 | 12 | — | #3,487 |
| 1981 | 12 | — | #3,416 |
| 1980 | 10 | — | #3,844 |
| 1979 | 7 | — | #4,857 |
| 1978 | 5 | — | #5,797 |
| 1977 | 11 | — | #3,392 |
| 1976 | 11 | — | #3,267 |
| 1975 | 5 | — | #5,481 |
| 1974 | 6 | — | #4,650 |
| 1973 | 7 | — | #4,065 |
| 1972 | 8 | — | #3,628 |
| 1971 | 5 | — | #4,924 |
| 1970 | 8 | — | #3,528 |
| 1968 | 6 | — | #3,679 |
| 1967 | 11 | — | #2,473 |
| 1966 | 5 | — | #3,955 |
| 1965 | 10 | — | #2,621 |
| 1964 | 8 | — | #3,052 |
| 1963 | 5 | — | #4,057 |
| 1962 | 6 | — | #3,643 |
| 1961 | 5 | — | #4,072 |
| 1960 | 10 | — | #2,686 |
| 1959 | 6 | — | #3,624 |
| 1958 | 11 | — | #2,507 |
| 1957 | 6 | — | #3,556 |
| 1956 | 8 | — | #2,973 |
| 1955 | 6 | — | #3,512 |
| 1954 | 8 | — | #2,944 |
| 1953 | 8 | — | #2,907 |
| 1952 | 5 | — | #3,746 |
| 1950 | 7 | — | #3,024 |
| 1949 | 5 | — | #3,693 |
| 1948 | 9 | — | #2,609 |
| 1946 | 9 | — | #2,535 |
| 1944 | 7 | — | #2,865 |
| 1943 | 8 | — | #2,739 |
| 1942 | 5 | — | #3,574 |
| 1941 | 5 | — | #3,512 |
| 1940 | 10 | — | #2,326 |
| 1939 | 7 | — | #2,834 |
| 1938 | 7 | — | #2,871 |
| 1937 | 8 | — | #2,683 |
| 1936 | 8 | — | #2,633 |
| 1935 | 6 | — | #3,260 |
| 1932 | 7 | — | #3,095 |
| 1929 | 5 | — | #3,967 |
| 1928 | 5 | — | #4,159 |
| 1927 | 6 | — | #3,787 |
| 1926 | 5 | — | #4,213 |
| 1924 | 5 | — | #4,361 |
| 1923 | 5 | — | #4,246 |
| 1922 | 5 | — | #4,322 |
| 1921 | 7 | — | #3,531 |
| 1920 | 7 | — | #3,497 |
| 1919 | 9 | — | #2,883 |
| 1915 | 7 | — | #3,088 |
| 1909 | 5 | — | #1,445 |