Isaias is an established boys' name that has climbed to its highest level yet, peaking in 2025.
Isaias is a boy name. In 2025 it ranked #426 for boy births in the United States (and #853 across all names), given to 755 babies — 789 including U.S. territories. Isaias first appears in 1915 and peaked in 2025 (755 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2025 | 755 | 789 | #426 |
| 2024 | 704 | 738 | #449 |
| 2023 | 705 | 750 | #441 |
| 2022 | 676 | 716 | #455 |
| 2021 | 600 | 628 | #491 |
| 2020 | 632 | 676 | #472 |
| 2019 | 580 | 618 | #495 |
| 2018 | 550 | 588 | #515 |
| 2017 | 508 | 558 | #547 |
| 2016 | 541 | 567 | #538 |
| 2015 | 520 | 555 | #552 |
| 2014 | 500 | 530 | #550 |
| 2013 | 499 | 525 | #533 |
| 2012 | 513 | 551 | #513 |
| 2011 | 475 | 505 | #538 |
| 2010 | 526 | 552 | #494 |
| 2009 | 569 | 595 | #481 |
| 2008 | 551 | 562 | #497 |
| 2007 | 521 | 537 | #509 |
| 2006 | 480 | 500 | #530 |
| 2005 | 475 | 494 | #518 |
| 2004 | 486 | 507 | #503 |
| 2003 | 382 | 412 | #578 |
| 2002 | 401 | 431 | #551 |
| 2001 | 435 | 453 | #518 |
| 2000 | 364 | 388 | #566 |
| 1999 | 332 | 360 | #587 |
| 1998 | 338 | 362 | #581 |
| 1997 | 253 | — | #649 |
| 1996 | 288 | — | #612 |
| 1995 | 237 | — | #689 |
| 1994 | 195 | — | #754 |
| 1993 | 192 | — | #754 |
| 1992 | 178 | — | #786 |
| 1991 | 165 | — | #803 |
| 1990 | 157 | — | #814 |
| 1989 | 144 | — | #834 |
| 1988 | 112 | — | #906 |
| 1987 | 94 | — | #977 |
| 1986 | 100 | — | #916 |
| 1985 | 95 | — | #936 |
| 1984 | 97 | — | #887 |
| 1983 | 86 | — | #950 |
| 1982 | 92 | — | #938 |
| 1981 | 83 | — | #998 |
| 1980 | 82 | — | #999 |
| 1979 | 76 | — | #1,020 |
| 1978 | 57 | — | #1,180 |
| 1977 | 46 | — | #1,348 |
| 1976 | 66 | — | #1,022 |
| 1975 | 42 | — | #1,351 |
| 1974 | 48 | — | #1,208 |
| 1973 | 54 | — | #1,112 |
| 1972 | 34 | — | #1,464 |
| 1971 | 48 | — | #1,188 |
| 1970 | 31 | — | #1,534 |
| 1969 | 28 | — | #1,540 |
| 1968 | 24 | — | #1,625 |
| 1967 | 21 | — | #1,732 |
| 1966 | 29 | — | #1,438 |
| 1965 | 25 | — | #1,573 |
| 1964 | 24 | — | #1,632 |
| 1963 | 24 | — | #1,641 |
| 1962 | 24 | — | #1,641 |
| 1961 | 23 | — | #1,713 |
| 1960 | 20 | — | #1,836 |
| 1959 | 23 | — | #1,687 |
| 1958 | 23 | — | #1,661 |
| 1957 | 23 | — | #1,696 |
| 1956 | 25 | — | #1,586 |
| 1955 | 17 | — | #1,930 |
| 1954 | 16 | — | #1,999 |
| 1953 | 22 | — | #1,650 |
| 1952 | 30 | — | #1,389 |
| 1951 | 20 | — | #1,699 |
| 1950 | 23 | — | #1,561 |
| 1949 | 18 | — | #1,790 |
| 1948 | 18 | — | #1,784 |
| 1947 | 9 | — | #2,764 |
| 1946 | 16 | — | #1,848 |
| 1945 | 21 | — | #1,468 |
| 1944 | 14 | — | #1,925 |
| 1943 | 12 | — | #2,222 |
| 1942 | 18 | — | #1,704 |
| 1941 | 14 | — | #1,950 |
| 1940 | 10 | — | #2,397 |
| 1939 | 17 | — | #1,670 |
| 1938 | 8 | — | #2,752 |
| 1937 | 11 | — | #2,266 |
| 1936 | 14 | — | #1,925 |
| 1935 | 20 | — | #1,563 |
| 1934 | 21 | — | #1,532 |
| 1933 | 12 | — | #2,149 |
| 1932 | 13 | — | #2,146 |
| 1931 | 12 | — | #2,264 |
| 1930 | 16 | — | #1,924 |
| 1929 | 23 | — | #1,547 |
| 1928 | 10 | — | #2,747 |
| 1927 | 10 | — | #2,799 |
| 1926 | 12 | — | #2,487 |
| 1925 | 9 | — | #3,027 |
| 1924 | 11 | — | #2,736 |
| 1922 | 9 | — | #3,126 |
| 1921 | 7 | — | #3,696 |
| 1920 | 7 | — | #3,638 |
| 1919 | 6 | — | #3,932 |
| 1917 | 6 | — | #3,749 |
| 1915 | 6 | — | #3,612 |