Alonzo is an established boys' name that has climbed to its highest level yet, peaking in 2022.
Alonzo is predominantly a boy name. In 2025 it ranked #511 for boy births in the United States (and #1,028 across all names), given to 590 babies. Alonzo first appears in 1880 and peaked in 2022 (651 births).
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2025 | 590 | 590 | — | #511 |
| 2024 | 595 | 595 | — | #512 |
| 2023 | 552 | 552 | — | #535 |
| 2022 | 651 | 651 | — | #471 |
| 2021 | 569 | 569 | — | #515 |
| 2020 | 626 | 626 | — | #477 |
| 2019 | 634 | 634 | — | #469 |
| 2018 | 612 | 612 | — | #476 |
| 2017 | 549 | 549 | — | #522 |
| 2016 | 499 | 499 | — | #565 |
| 2015 | 542 | 542 | — | #527 |
| 2014 | 527 | 527 | — | #528 |
| 2013 | 545 | 545 | — | #500 |
| 2012 | 454 | 454 | — | #568 |
| 2011 | 455 | 455 | — | #558 |
| 2010 | 434 | 434 | — | #581 |
| 2009 | 412 | 412 | — | #612 |
| 2008 | 483 | 483 | — | #543 |
| 2007 | 432 | 432 | — | #588 |
| 2006 | 450 | 450 | — | #559 |
| 2005 | 452 | 452 | — | #537 |
| 2004 | 421 | 421 | — | #547 |
| 2003 | 436 | 436 | — | #533 |
| 2002 | 433 | 433 | — | #523 |
| 2001 | 375 | 375 | — | #559 |
| 2000 | 435 | 435 | — | #516 |
| 1999 | 410 | 410 | — | #519 |
| 1998 | 394 | 394 | — | #526 |
| 1997 | 450 | — | — | #479 |
| 1996 | 407 | — | — | #507 |
| 1995 | 453 | — | — | #477 |
| 1994 | 469 | — | — | #465 |
| 1993 | 421 | — | — | #494 |
| 1992 | 398 | — | — | #506 |
| 1991 | 428 | — | — | #476 |
| 1990 | 432 | — | — | #476 |
| 1989 | 426 | — | — | #455 |
| 1988 | 467 | — | #9,280 | #421 |
| 1987 | 413 | — | #8,808 | #441 |
| 1986 | 376 | — | #10,961 | #452 |
| 1985 | 315 | — | — | #488 |
| 1984 | 321 | — | — | #470 |
| 1983 | 327 | — | #10,322 | #466 |
| 1982 | 333 | — | #7,490 | #469 |
| 1981 | 316 | — | #9,143 | #473 |
| 1980 | 370 | — | #8,196 | #431 |
| 1979 | 334 | — | — | #444 |
| 1978 | 282 | — | — | #483 |
| 1977 | 360 | — | — | #416 |
| 1976 | 301 | — | — | #450 |
| 1975 | 338 | — | #7,191 | #432 |
| 1974 | 341 | — | #8,817 | #430 |
| 1973 | 357 | — | — | #413 |
| 1972 | 374 | — | #7,309 | #411 |
| 1971 | 425 | — | #6,632 | #394 |
| 1970 | 410 | — | #6,382 | #402 |
| 1969 | 414 | — | — | #385 |
| 1968 | 385 | — | — | #397 |
| 1967 | 405 | — | — | #371 |
| 1966 | 384 | — | — | #389 |
| 1965 | 429 | — | #5,296 | #376 |
| 1964 | 449 | — | — | #369 |
| 1963 | 463 | — | #6,607 | #370 |
| 1962 | 538 | — | — | #336 |
| 1961 | 484 | — | #4,891 | #366 |
| 1960 | 469 | — | #6,400 | #367 |
| 1959 | 450 | — | #5,043 | #375 |
| 1958 | 460 | — | #5,420 | #362 |
| 1957 | 382 | — | #6,099 | #400 |
| 1956 | 424 | — | #5,331 | #360 |
| 1955 | 423 | — | #4,381 | #354 |
| 1954 | 380 | — | #5,764 | #366 |
| 1953 | 396 | — | — | #348 |
| 1952 | 341 | — | — | #364 |
| 1951 | 383 | — | — | #348 |
| 1950 | 364 | — | — | #353 |
| 1949 | 297 | — | — | #390 |
| 1948 | 355 | — | #5,254 | #360 |
| 1947 | 300 | — | — | #396 |
| 1946 | 259 | — | — | #400 |
| 1945 | 219 | — | — | #408 |
| 1944 | 235 | — | — | #396 |
| 1943 | 263 | — | — | #378 |
| 1942 | 245 | — | — | #387 |
| 1941 | 223 | — | — | #384 |
| 1940 | 256 | — | — | #357 |
| 1939 | 249 | — | — | #352 |
| 1938 | 233 | — | — | #368 |
| 1937 | 226 | — | — | #358 |
| 1936 | 207 | — | — | #380 |
| 1935 | 240 | — | — | #354 |
| 1934 | 253 | — | — | #345 |
| 1933 | 252 | — | — | #335 |
| 1932 | 271 | — | — | #333 |
| 1931 | 235 | — | — | #368 |
| 1930 | 268 | — | — | #341 |
| 1929 | 244 | — | #4,589 | #372 |
| 1928 | 265 | — | — | #350 |
| 1927 | 292 | — | #4,826 | #338 |
| 1926 | 298 | — | — | #335 |
| 1925 | 295 | — | — | #336 |
| 1924 | 340 | — | — | #310 |
| 1923 | 319 | — | — | #327 |
| 1922 | 320 | — | — | #321 |
| 1921 | 315 | — | — | #335 |
| 1920 | 308 | — | — | #332 |
| 1919 | 321 | — | — | #309 |
| 1918 | 287 | — | — | #336 |
| 1917 | 286 | — | — | #319 |
| 1916 | 274 | — | — | #315 |
| 1915 | 267 | — | — | #318 |
| 1914 | 204 | — | — | #318 |
| 1913 | 184 | — | — | #293 |
| 1912 | 177 | — | — | #263 |
| 1911 | 128 | — | — | #223 |
| 1910 | 90 | — | — | #254 |
| 1909 | 95 | — | — | #223 |
| 1908 | 57 | — | — | #288 |
| 1907 | 82 | — | — | #224 |
| 1906 | 85 | — | — | #205 |
| 1905 | 93 | — | — | #190 |
| 1904 | 76 | — | — | #211 |
| 1903 | 56 | — | — | #248 |
| 1902 | 81 | — | — | #199 |
| 1901 | 67 | — | — | #208 |
| 1900 | 116 | — | — | #182 |
| 1899 | 78 | — | — | #180 |
| 1898 | 104 | — | — | #161 |
| 1897 | 84 | — | — | #181 |
| 1896 | 89 | — | — | #182 |
| 1895 | 85 | — | — | #185 |
| 1894 | 102 | — | — | #150 |
| 1893 | 71 | — | — | #201 |
| 1892 | 104 | — | — | #154 |
| 1891 | 74 | — | — | #175 |
| 1890 | 88 | — | — | #161 |
| 1889 | 102 | — | — | #141 |
| 1888 | 110 | — | — | #139 |
| 1887 | 88 | — | — | #144 |
| 1886 | 106 | — | — | #128 |
| 1885 | 104 | — | — | #130 |
| 1884 | 112 | — | — | #128 |
| 1883 | 100 | — | — | #123 |
| 1882 | 133 | — | — | #111 |
| 1881 | 111 | — | — | #110 |
| 1880 | 122 | — | — | #110 |