Alonzo
Alonzo was given to 590 boys in 2025, #511 among boys’ names; 46,109 Americans have been recorded with it since 1880 (Social Security Administration, published May 2026).
An estimated 31,400 Americans named Alonzo and born in the U.S. are alive in 2026 (68% of everyone recorded); the median is 33 years old and half are between 14 and 56.
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Alonzo by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
What does Alonzo mean?
Wiktionary, English section
Alonzo is “a male given name from the Germanic languages, variant of Alfonso.”
Meaning: Wiktionary, English section, as of Sep 25, 2026 (CC BY‑SA 4.0).
How popular is Alonzo?
#511 among boys’ names, 2025
Alonzo rose from #527 in 2015 to #511 in 2025 among boys’ names; its share of boys born rose from 0.28 to 0.35 per 1,000.
651 babies in 2022, the peak
Alonzo peaked in 2022, when 651 boys were given it, #471 among boys’ names. The 590 births of 2025 are 91% of that peak.
| Year | Births | Rank | Per 1,000 boys |
|---|---|---|---|
| 2025 | 590 | #511 | 0.35 |
| 2024 | 595 | #512 | 0.35 |
| 2023 | 552 | #535 | 0.32 |
| 2022 | 651 | #471 | 0.37 |
| 2021 | 569 | #515 | 0.33 |
| 2020 | 626 | #477 | 0.36 |
| 2019 | 634 | #469 | 0.35 |
| 2018 | 612 | #476 | 0.34 |
| 2017 | 549 | #522 | 0.30 |
| 2016 | 499 | #565 | 0.26 |
Every recorded year (146)
| Year | Births | Rank | Per 1,000 boys |
|---|---|---|---|
| 2015 | 542 | #527 | 0.28 |
| 2014 | 527 | #528 | 0.27 |
| 2013 | 545 | #500 | 0.29 |
| 2012 | 454 | #568 | 0.24 |
| 2011 | 455 | #558 | 0.24 |
| 2010 | 434 | #581 | 0.23 |
| 2009 | 412 | #612 | 0.21 |
| 2008 | 483 | #543 | 0.24 |
| 2007 | 432 | #588 | 0.21 |
| 2006 | 450 | #559 | 0.22 |
| 2005 | 452 | #537 | 0.23 |
| 2004 | 421 | #547 | 0.21 |
| 2003 | 436 | #533 | 0.22 |
| 2002 | 433 | #523 | 0.22 |
| 2001 | 375 | #559 | 0.19 |
| 2000 | 435 | #516 | 0.22 |
| 1999 | 410 | #519 | 0.21 |
| 1998 | 394 | #526 | 0.21 |
| 1997 | 450 | #479 | 0.24 |
| 1996 | 407 | #507 | 0.21 |
| 1995 | 453 | #477 | 0.24 |
| 1994 | 469 | #465 | 0.24 |
| 1993 | 421 | #494 | 0.21 |
| 1992 | 398 | #506 | 0.20 |
| 1991 | 428 | #476 | 0.21 |
| 1990 | 432 | #475 | 0.21 |
| 1989 | 426 | #455 | 0.21 |
| 1988 | 460 | #421 | 0.24 |
| 1987 | 406 | #441 | 0.22 |
| 1986 | 371 | #452 | 0.20 |
| 1985 | 315 | #488 | 0.17 |
| 1984 | 321 | #470 | 0.18 |
| 1983 | 322 | #466 | 0.18 |
| 1982 | 325 | #469 | 0.18 |
| 1981 | 310 | #473 | 0.17 |
| 1980 | 363 | #431 | 0.20 |
| 1979 | 334 | #444 | 0.19 |
| 1978 | 282 | #483 | 0.17 |
| 1977 | 360 | #416 | 0.22 |
| 1976 | 301 | #450 | 0.19 |
| 1975 | 331 | #432 | 0.21 |
| 1974 | 336 | #430 | 0.21 |
| 1973 | 357 | #413 | 0.23 |
| 1972 | 368 | #411 | 0.23 |
| 1971 | 418 | #394 | 0.24 |
| 1970 | 403 | #402 | 0.22 |
| 1969 | 414 | #385 | 0.23 |
| 1968 | 385 | #397 | 0.22 |
| 1967 | 405 | #371 | 0.23 |
| 1966 | 384 | #389 | 0.22 |
| 1965 | 422 | #376 | 0.23 |
| 1964 | 449 | #369 | 0.23 |
| 1963 | 458 | #370 | 0.23 |
| 1962 | 538 | #336 | 0.26 |
| 1961 | 476 | #366 | 0.22 |
| 1960 | 464 | #367 | 0.22 |
| 1959 | 443 | #375 | 0.21 |
| 1958 | 454 | #362 | 0.21 |
| 1957 | 377 | #399 | 0.17 |
| 1956 | 418 | #359 | 0.20 |
| 1955 | 415 | #353 | 0.20 |
| 1954 | 375 | #365 | 0.18 |
| 1953 | 396 | #347 | 0.20 |
| 1952 | 341 | #363 | 0.18 |
| 1951 | 383 | #347 | 0.20 |
| 1950 | 364 | #352 | 0.20 |
| 1949 | 297 | #390 | 0.17 |
| 1948 | 350 | #360 | 0.20 |
| 1947 | 300 | #396 | 0.16 |
| 1946 | 259 | #400 | 0.16 |
| 1945 | 219 | #408 | 0.16 |
| 1944 | 235 | #396 | 0.17 |
| 1943 | 263 | #378 | 0.18 |
| 1942 | 245 | #387 | 0.18 |
| 1941 | 223 | #384 | 0.18 |
| 1940 | 256 | #357 | 0.22 |
| 1939 | 249 | #352 | 0.22 |
| 1938 | 233 | #368 | 0.21 |
| 1937 | 226 | #358 | 0.21 |
| 1936 | 207 | #380 | 0.20 |
| 1935 | 240 | #354 | 0.23 |
| 1934 | 253 | #345 | 0.25 |
| 1933 | 252 | #335 | 0.25 |
| 1932 | 271 | #333 | 0.26 |
| 1931 | 235 | #368 | 0.23 |
| 1930 | 268 | #341 | 0.24 |
| 1929 | 239 | #372 | 0.22 |
| 1928 | 265 | #350 | 0.24 |
| 1927 | 287 | #338 | 0.25 |
| 1926 | 298 | #335 | 0.27 |
| 1925 | 295 | #336 | 0.26 |
| 1924 | 340 | #310 | 0.30 |
| 1923 | 319 | #327 | 0.29 |
| 1922 | 320 | #321 | 0.29 |
| 1921 | 315 | #335 | 0.29 |
| 1920 | 308 | #332 | 0.29 |
| 1919 | 321 | #309 | 0.33 |
| 1918 | 287 | #336 | 0.28 |
| 1917 | 286 | #319 | 0.31 |
| 1916 | 274 | #315 | 0.31 |
| 1915 | 267 | #318 | 0.31 |
| 1914 | 204 | #318 | 0.31 |
| 1913 | 184 | #293 | 0.36 |
| 1912 | 177 | #263 | 0.41 |
| 1911 | 128 | #223 | 0.57 |
| 1910 | 90 | #254 | 0.46 |
| 1909 | 95 | #223 | 0.58 |
| 1908 | 57 | #288 | 0.37 |
| 1907 | 82 | #224 | 0.56 |
| 1906 | 85 | #205 | 0.64 |
| 1905 | 93 | #190 | 0.70 |
| 1904 | 76 | #211 | 0.59 |
| 1903 | 56 | #248 | 0.47 |
| 1902 | 81 | #199 | 0.66 |
| 1901 | 67 | #208 | 0.63 |
| 1900 | 116 | #182 | 0.77 |
| 1899 | 78 | #180 | 0.73 |
| 1898 | 104 | #161 | 0.85 |
| 1897 | 84 | #181 | 0.74 |
| 1896 | 89 | #182 | 0.74 |
| 1895 | 85 | #185 | 0.72 |
| 1894 | 102 | #150 | 0.88 |
| 1893 | 71 | #201 | 0.63 |
| 1892 | 104 | #154 | 0.85 |
| 1891 | 74 | #175 | 0.73 |
| 1890 | 88 | #161 | 0.79 |
| 1889 | 102 | #141 | 0.92 |
| 1888 | 110 | #139 | 0.91 |
| 1887 | 88 | #144 | 0.87 |
| 1886 | 106 | #128 | 1.0 |
| 1885 | 104 | #130 | 1.0 |
| 1884 | 112 | #128 | 1.0 |
| 1883 | 100 | #123 | 1.0 |
| 1882 | 133 | #111 | 1.2 |
| 1881 | 111 | #110 | 1.1 |
| 1880 | 122 | #110 | 1.1 |
Ranks and shares: boys’ names in each year’s SSA file; share of all boys SSA recorded that year.
Is Alonzo a boy’s or a girl’s name?
Alonzo has been given almost only to boys: 154 girls in 146 years of records.
Girls and boys named Alonzo: the SSA national file counts each sex separately.
How many people are named Alonzo, and how old are they?
31,400 alive in 2026, estimated
That is 68% of the 46,109 Americans ever recorded as Alonzo. The median Alonzo alive today is 33 years old; half are between 14 and 56.
The 2020 Census counted 24,457 people named Alonzo (68 women and girls, 24,389 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 29,754 born in the U.S. The Census count is 18% below that prediction. Possible reasons: people who give a short form or another name to the Census, and a survival estimate that can run high.
Alive today, by age
Alive today, by generation
| Generation | Born | Alive |
|---|---|---|
| Silent Generation | 1928-1945 | 831 |
| Baby Boomers | 1946-1964 | 5,150 |
| Generation X | 1965-1980 | 5,200 |
| Millennials | 1981-1996 | 6,000 |
| Generation Z | 1997-2012 | 6,810 |
| Generation Alpha | 2013-2025 | 7,440 |
An estimate, not a count. SSA’s files count people born in the United States who received a Social Security number, so anyone born abroad is not in them; before 1937 most people got a number as adults, and their survival is counted from that age.
Living estimate: SSA births carried forward with the survival rates in SSA’s cohort life tables (2024 Trustees Report) for each birth year and sex. How the estimate is made. Count: Census Bureau, first names in the 2020 Census (released April 14, 2026; names reported 100 or more times, with the Bureau’s disclosure-avoidance adjustment).
Where are babies named Alonzo born?
The states with the most babies named Alonzo are California, Texas and Florida, with 51% of its births recorded by state in 2025.
| State | Births 2025 | Rank, boys | vs. national |
|---|---|---|---|
| California | 149 | #252 | 1.2× |
| Texas | 93 | #389 | 1.4× |
| Florida | 36 | #499 | 1.3× |
| Illinois | 29 | #364 | 1.2× |
| New York | 19 | #746 | 0.6× |
| Arizona | 19 | #394 | 1.3× |
| Wisconsin | 14 | #374 | 0.3× |
| Missouri | 13 | #459 | 0.8× |
| Georgia | 12 | #756 | 1.5× |
| Ohio | 12 | #711 | 0.6× |
Where Alonzo is more common than its national share predicts
Relative to its national share, Alonzo is most over-represented in District of Columbia: since 1910 it was given 2.0 times as often there as its national share each year would predict.
States: SSA state file, 1910-2025, published May 8, 2026; births count girls and boys together, and the rank is among boys’ names in the state in 2025. The file leaves out any state and year with fewer than 5 babies of the name, so small states are undercounted; each ratio compares the state’s births of Alonzo with the births its national share predicts year by year, for states with at least 100 births of the name.
Names spelled alike
Of these 3 names spelled alike, given to 49,924 babies since 1880, Alonzo is the most given (92% of them). In 2025 it was given to 590 of their 606 babies (97%), again the most given.
Spelled alike: names in the SSA national file with the same pattern of letters and sounds and at most two letters apart, and Wiktionary’s listed forms; births since 1880 and in 2025, and each name’s peak year, from the SSA national file, published May 8, 2026. Some are separate names, not spellings of one.
Names that rose and fell in the same decades as Alonzo
Names whose births rose and fell across the same decades, measured on each decade’s share of births.
Similar histories: each decade’s share of births, from the SSA national file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
More about Alonzo and names like it
- Compare Alonzo and AlonzaBirths, ranks, peak and the living estimate side by side.
- The most given names of the 2020sAlonzo peaked in 2022.
- California’s most given namesThe state where SSA recorded the most babies named Alonzo since 1910.
- The top names of 2022The year the most babies were named Alonzo.
- The names of Generation AlphaMost people named Alonzo alive today were born 2013-2025.
- Names starting with AMost given first.