Alonso
Alonso was given to 324 boys in 2025, #785 among boys’ names; 12,231 Americans have been recorded with it since 1915 (Social Security Administration, published May 2026).
An estimated 11,700 Americans named Alonso and born in the U.S. are alive in 2026 (96% of everyone recorded); the median is 18 years old and half are between 10 and 28.
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Alonso by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
What does Alonso mean?
Wiktionary, English section
Alonso 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 Alonso?
#785 among boys’ names, 2025
Alonso fell from #733 in 2015 to #785 in 2025 among boys’ names, although its share of boys born rose from 0.17 to 0.19 per 1,000.
380 babies in 2010, the peak
Alonso peaked in 2010, when 380 boys were given it, #636 among boys’ names. The 324 births of 2025 are 85% of that peak.
| Year | Births | Rank | Per 1,000 boys |
|---|---|---|---|
| 2025 | 324 | #785 | 0.19 |
| 2024 | 328 | #769 | 0.19 |
| 2023 | 287 | #845 | 0.17 |
| 2022 | 340 | #752 | 0.19 |
| 2021 | 318 | #778 | 0.18 |
| 2020 | 297 | #784 | 0.17 |
| 2019 | 316 | #755 | 0.18 |
| 2018 | 300 | #772 | 0.17 |
| 2017 | 317 | #746 | 0.17 |
| 2016 | 319 | #763 | 0.17 |
Every recorded year (108)
| Year | Births | Rank | Per 1,000 boys |
|---|---|---|---|
| 2015 | 333 | #733 | 0.17 |
| 2014 | 339 | #712 | 0.18 |
| 2013 | 348 | #688 | 0.18 |
| 2012 | 312 | #742 | 0.16 |
| 2011 | 347 | #678 | 0.18 |
| 2010 | 380 | #636 | 0.20 |
| 2009 | 373 | #659 | 0.19 |
| 2008 | 363 | #665 | 0.18 |
| 2007 | 363 | #661 | 0.17 |
| 2006 | 360 | #644 | 0.18 |
| 2005 | 329 | #655 | 0.16 |
| 2004 | 297 | #677 | 0.15 |
| 2003 | 296 | #669 | 0.15 |
| 2002 | 316 | #622 | 0.16 |
| 2001 | 243 | #721 | 0.13 |
| 2000 | 285 | #639 | 0.15 |
| 1999 | 233 | #709 | 0.12 |
| 1998 | 220 | #737 | 0.12 |
| 1997 | 194 | #765 | 0.10 |
| 1996 | 193 | #761 | 0.10 |
| 1995 | 222 | #713 | 0.12 |
| 1994 | 154 | #861 | 0.08 |
| 1993 | 198 | #738 | 0.10 |
| 1992 | 161 | #829 | 0.08 |
| 1991 | 151 | #841 | 0.07 |
| 1990 | 157 | #808 | 0.08 |
| 1989 | 125 | #904 | 0.06 |
| 1988 | 120 | #864 | 0.06 |
| 1987 | 95 | #967 | 0.05 |
| 1986 | 96 | #931 | 0.05 |
| 1985 | 63 | #1,180 | 0.03 |
| 1984 | 89 | #932 | 0.05 |
| 1983 | 60 | #1,166 | 0.03 |
| 1982 | 71 | #1,082 | 0.04 |
| 1981 | 62 | #1,169 | 0.03 |
| 1980 | 55 | #1,238 | 0.03 |
| 1979 | 59 | #1,177 | 0.03 |
| 1978 | 60 | #1,134 | 0.04 |
| 1977 | 43 | #1,392 | 0.03 |
| 1976 | 42 | #1,373 | 0.03 |
| 1975 | 51 | #1,182 | 0.03 |
| 1974 | 48 | #1,198 | 0.03 |
| 1973 | 44 | #1,238 | 0.03 |
| 1972 | 40 | #1,327 | 0.02 |
| 1971 | 30 | #1,596 | 0.02 |
| 1970 | 40 | #1,313 | 0.02 |
| 1969 | 24 | #1,680 | 0.01 |
| 1968 | 20 | #1,788 | 0.01 |
| 1967 | 31 | #1,363 | 0.02 |
| 1966 | 20 | #1,722 | 0.01 |
| 1965 | 23 | #1,624 | 0.01 |
| 1964 | 20 | #1,793 | 0.01 |
| 1963 | 25 | #1,585 | 0.01 |
| 1962 | 29 | #1,455 | 0.01 |
| 1961 | 22 | #1,730 | 0.01 |
| 1960 | 22 | #1,727 | 0.01 |
| 1959 | 13 | #2,298 | 0.01 |
| 1958 | 13 | #2,264 | 0.01 |
| 1957 | 17 | #1,951 | 0.01 |
| 1956 | 19 | #1,821 | 0.01 |
| 1955 | 9 | #2,768 | under 0.01 |
| 1954 | 18 | #1,826 | 0.01 |
| 1953 | 9 | #2,712 | under 0.01 |
| 1952 | 24 | #1,546 | 0.01 |
| 1951 | 11 | #2,370 | 0.01 |
| 1950 | 13 | #2,111 | 0.01 |
| 1949 | 11 | #2,341 | 0.01 |
| 1948 | 11 | #2,326 | 0.01 |
| 1947 | 17 | #1,849 | 0.01 |
| 1946 | 7 | #2,925 | under 0.01 |
| 1945 | 5 | #3,343 | under 0.01 |
| 1944 | 8 | #2,633 | 0.01 |
| 1943 | 5 | #3,555 | under 0.01 |
| 1942 | 5 | #3,577 | under 0.01 |
| 1941 | 5 | #3,516 | under 0.01 |
| 1939 | 9 | #2,452 | 0.01 |
| 1937 | 10 | #2,334 | 0.01 |
| 1936 | 5 | #3,558 | under 0.01 |
| 1935 | 6 | #3,264 | 0.01 |
| 1934 | 7 | #2,978 | 0.01 |
| 1933 | 10 | #2,370 | 0.01 |
| 1932 | 9 | #2,644 | 0.01 |
| 1931 | 7 | #3,100 | 0.01 |
| 1930 | 9 | #2,779 | 0.01 |
| 1929 | 11 | #2,455 | 0.01 |
| 1928 | 9 | #2,850 | 0.01 |
| 1927 | 5 | #4,217 | under 0.01 |
| 1926 | 9 | #2,907 | 0.01 |
| 1924 | 6 | #3,881 | 0.01 |
| 1923 | 5 | #4,248 | under 0.01 |
| 1922 | 7 | #3,534 | 0.01 |
| 1921 | 5 | #4,336 | under 0.01 |
| 1920 | 9 | #2,970 | 0.01 |
| 1919 | 7 | #3,398 | 0.01 |
| 1918 | 7 | #3,379 | 0.01 |
| 1917 | 5 | #3,998 | 0.01 |
| 1916 | 7 | #3,181 | 0.01 |
| 1915 | 5 | #3,836 | 0.01 |
Ranks and shares: boys’ names in each year’s SSA file; share of all boys SSA recorded that year.
Is Alonso a boy’s or a girl’s name?
Alonso has been recorded only for boys: SSA lists no girls with the name in 108 years of records (it lists a name only in years with 5 or more babies of a sex).
Girls and boys named Alonso: the SSA national file counts each sex separately.
How many people are named Alonso, and how old are they?
11,700 alive in 2026, estimated
That is 96% of the 12,231 Americans ever recorded as Alonso. The median Alonso alive today is 18 years old; half are between 10 and 28.
The 2020 Census counted 13,114 people named Alonso (44 women and girls, 13,070 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 9,997 born in the U.S. The Census count is 31% above that prediction. Possible reasons: the Census counts people born abroad, whom SSA’s files leave out, and it records the name people give, which SSA may have recorded under another spelling or as part of a compound name.
Alive today, by age
Alive today, by generation
| Generation | Born | Alive |
|---|---|---|
| Silent Generation | 1928-1945 | 20 |
| Baby Boomers | 1946-1964 | 212 |
| Generation X | 1965-1980 | 562 |
| Millennials | 1981-1996 | 1,930 |
| Generation Z | 1997-2012 | 4,830 |
| Generation Alpha | 2013-2025 | 4,140 |
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 Alonso born?
The states with the most babies named Alonso are California, Texas and Illinois, with 63% of its births recorded by state in 2025.
| State | Births 2025 | Rank, boys | vs. national |
|---|---|---|---|
| California | 78 | #417 | 2.4× |
| Texas | 72 | #461 | 2.2× |
| Illinois | 19 | #514 | 1.2× |
| Arizona | 17 | #432 | 2.5× |
| Florida | 17 | #848 | 0.6× |
| New York | 12 | #996 | 0.3× |
| North Carolina | 11 | #779 | 0.4× |
| Washington | 9 | #687 | 0.8× |
| New Jersey | 9 | #710 | 0.2× |
| Colorado | 7 | #682 | 1.6× |
Where Alonso is more common than its national share predicts
Relative to its national share, Alonso is most over-represented in Arizona: since 1915 it was given 2.5 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 Alonso with the births its national share predicts year by year, for states with at least 100 births of the name.
Names that rose and fell in the same decades as Alonso
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 Alonso and names like it
- Compare Alonso and AbimaelBirths, ranks, peak and the living estimate side by side.
- The most given names of the 2010sAlonso peaked in 2010.
- California’s most given namesThe state where SSA recorded the most babies named Alonso since 1910.
- The top names of 2010The year the most babies were named Alonso.
- The names of Generation ZMost people named Alonso alive today were born 1997-2012.
- Names starting with AMost given first.