Alfonso is an established boys' name that peaked in 1991 and has grown less common since.
Alfonso is predominantly a boy name. In 2025 it ranked #1,012 for boy births in the United States (and #2,056 across all names), given to 223 babies — 228 including U.S. territories. Alfonso first appears in 1881 and peaked in 1991 (574 births).
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2025 | 223 | 228 | — | #1,012 |
| 2024 | 251 | 251 | — | #922 |
| 2023 | 224 | 224 | — | #977 |
| 2022 | 252 | 252 | — | #920 |
| 2021 | 265 | 272 | — | #871 |
| 2020 | 209 | 209 | — | #1,007 |
| 2019 | 229 | 234 | — | #942 |
| 2018 | 235 | 235 | — | #915 |
| 2017 | 279 | 285 | — | #811 |
| 2016 | 229 | 234 | — | #927 |
| 2015 | 293 | 299 | — | #796 |
| 2014 | 263 | 268 | — | #849 |
| 2013 | 286 | 286 | — | #787 |
| 2012 | 283 | 283 | — | #798 |
| 2011 | 279 | 279 | — | #795 |
| 2010 | 304 | 304 | — | #746 |
| 2009 | 382 | 391 | — | #649 |
| 2008 | 430 | 430 | — | #588 |
| 2007 | 499 | 499 | — | #521 |
| 2006 | 457 | 463 | — | #550 |
| 2005 | 455 | 468 | — | #534 |
| 2004 | 458 | 471 | — | #523 |
| 2003 | 455 | 464 | — | #521 |
| 2002 | 468 | 481 | — | #493 |
| 2001 | 428 | 435 | — | #521 |
| 2000 | 476 | 486 | — | #491 |
| 1999 | 490 | 500 | — | #464 |
| 1998 | 485 | 494 | — | #464 |
| 1997 | 506 | — | — | #441 |
| 1996 | 508 | — | — | #440 |
| 1995 | 495 | — | — | #454 |
| 1994 | 530 | — | — | #430 |
| 1993 | 544 | — | — | #421 |
| 1992 | 532 | — | — | #418 |
| 1991 | 580 | — | #11,549 | #395 |
| 1990 | 537 | — | — | #422 |
| 1989 | 496 | — | — | #419 |
| 1988 | 502 | — | — | #394 |
| 1987 | 444 | — | #8,797 | #417 |
| 1986 | 493 | — | #10,951 | #378 |
| 1985 | 458 | — | — | #395 |
| 1984 | 399 | — | — | #413 |
| 1983 | 420 | — | — | #395 |
| 1982 | 434 | — | #10,548 | #392 |
| 1981 | 460 | — | — | #375 |
| 1980 | 453 | — | #10,420 | #381 |
| 1979 | 441 | — | — | #385 |
| 1978 | 420 | — | #9,783 | #380 |
| 1977 | 412 | — | — | #388 |
| 1976 | 382 | — | — | #395 |
| 1975 | 433 | — | — | #374 |
| 1974 | 396 | — | — | #389 |
| 1973 | 433 | — | #7,455 | #369 |
| 1972 | 394 | — | #5,486 | #399 |
| 1971 | 416 | — | — | #395 |
| 1970 | 414 | — | #7,082 | #396 |
| 1969 | 363 | — | — | #416 |
| 1968 | 363 | — | #7,031 | #408 |
| 1967 | 386 | — | #6,816 | #385 |
| 1966 | 366 | — | — | #391 |
| 1965 | 384 | — | — | #401 |
| 1964 | 389 | — | — | #407 |
| 1963 | 399 | — | — | #403 |
| 1962 | 359 | — | #5,866 | #426 |
| 1961 | 399 | — | — | #397 |
| 1960 | 383 | — | — | #406 |
| 1959 | 392 | — | — | #401 |
| 1958 | 385 | — | — | #397 |
| 1957 | 415 | — | — | #379 |
| 1956 | 373 | — | — | #388 |
| 1955 | 387 | — | — | #368 |
| 1954 | 412 | — | — | #353 |
| 1953 | 393 | — | — | #349 |
| 1952 | 357 | — | #5,569 | #362 |
| 1951 | 360 | — | #4,841 | #366 |
| 1950 | 356 | — | — | #358 |
| 1949 | 357 | — | #5,254 | #358 |
| 1948 | 387 | — | #4,207 | #345 |
| 1947 | 354 | — | — | #365 |
| 1946 | 299 | — | — | #377 |
| 1945 | 261 | — | — | #373 |
| 1944 | 274 | — | — | #364 |
| 1943 | 269 | — | — | #373 |
| 1942 | 264 | — | — | #374 |
| 1941 | 262 | — | — | #361 |
| 1940 | 272 | — | — | #345 |
| 1939 | 282 | — | — | #329 |
| 1938 | 291 | — | — | #325 |
| 1937 | 270 | — | — | #331 |
| 1936 | 287 | — | — | #318 |
| 1935 | 265 | — | — | #336 |
| 1934 | 271 | — | — | #329 |
| 1933 | 277 | — | — | #323 |
| 1932 | 323 | — | — | #307 |
| 1931 | 353 | — | #3,858 | #298 |
| 1930 | 378 | — | #4,563 | #295 |
| 1929 | 361 | — | #4,581 | #294 |
| 1928 | 335 | — | — | #303 |
| 1927 | 340 | — | — | #311 |
| 1926 | 326 | — | — | #313 |
| 1925 | 331 | — | — | #313 |
| 1924 | 353 | — | — | #305 |
| 1923 | 343 | — | — | #306 |
| 1922 | 311 | — | #4,456 | #334 |
| 1921 | 321 | — | — | #329 |
| 1920 | 284 | — | — | #349 |
| 1919 | 220 | — | — | #394 |
| 1918 | 237 | — | — | #390 |
| 1917 | 228 | — | — | #372 |
| 1916 | 212 | — | — | #378 |
| 1915 | 184 | — | — | #396 |
| 1914 | 152 | — | — | #384 |
| 1913 | 156 | — | — | #325 |
| 1912 | 131 | — | — | #329 |
| 1911 | 69 | — | — | #328 |
| 1910 | 60 | — | — | #318 |
| 1909 | 57 | — | — | #302 |
| 1908 | 39 | — | — | #365 |
| 1907 | 42 | — | — | #328 |
| 1906 | 30 | — | — | #394 |
| 1905 | 36 | — | — | #337 |
| 1904 | 31 | — | — | #360 |
| 1903 | 22 | — | — | #430 |
| 1902 | 23 | — | — | #426 |
| 1901 | 23 | — | — | #394 |
| 1900 | 35 | — | — | #375 |
| 1899 | 11 | — | — | #614 |
| 1898 | 19 | — | — | #473 |
| 1897 | 14 | — | — | #556 |
| 1896 | 14 | — | — | #552 |
| 1895 | 10 | — | — | #685 |
| 1894 | 7 | — | — | #858 |
| 1893 | 8 | — | — | #768 |
| 1892 | 10 | — | — | #689 |
| 1891 | 10 | — | — | #600 |
| 1890 | 5 | — | — | #998 |
| 1889 | 7 | — | — | #793 |
| 1888 | 7 | — | — | #815 |
| 1886 | 8 | — | — | #697 |
| 1883 | 9 | — | — | #644 |
| 1882 | 6 | — | — | #842 |
| 1881 | 6 | — | — | #783 |