Isidoro
Isidoro was last recorded in 2023, when 9 babies were given it; 1,292 Americans have been recorded with it between 1913 and 2023 (Social Security Administration, published May 2026).
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Isidoro by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
What does Isidoro mean?
Wiktionary, Spanish section
Isidoro is “a male given name, equivalent to English Isidore”
Inherited from Old Spanish Ysidoro, Isidoro (c. 1266), a learned borrowing from Latin Īsidōrus. Compare with the inherited doublet Isidro.
/isiˈdoɾo/
Meaning: Wiktionary, Spanish section, as of Sep 25, 2026 (CC BY‑SA 4.0).
How popular is Isidoro?
Unranked in 2025
Its last boys’ rank on record is #8,500, in 2023; SSA lists a name only in years with 5 or more births.
24 babies in 1929, the peak
Isidoro peaked in 1929, when 24 boys were given it, #1,502 among boys’ names. It was not recorded in 2025.
| Year | Births | Rank | Per million boys |
|---|---|---|---|
| 2023 | 9 | #8,500 | 5.3 |
| 2022 | 5 | #13,093 | 2.9 |
| 2021 | 8 | #9,155 | 4.6 |
| 2018 | 7 | #10,072 | 3.9 |
| 2017 | 7 | #10,115 | 3.8 |
| 2016 | 5 | #12,964 | 2.6 |
| 2011 | 7 | #10,028 | 3.7 |
| 2010 | 8 | #9,111 | 4.2 |
| 2009 | 7 | #10,260 | 3.5 |
| 2008 | 11 | #7,387 | 5.4 |
Every recorded year (102)
| Year | Births | Rank | Per million boys |
|---|---|---|---|
| 2007 | 16 | #5,519 | 7.7 |
| 2006 | 14 | #5,891 | 6.8 |
| 2005 | 8 | #8,587 | 4.0 |
| 2003 | 14 | #5,364 | 7.1 |
| 2002 | 7 | #8,811 | 3.6 |
| 2001 | 14 | #5,227 | 7.2 |
| 2000 | 20 | #3,972 | 10.2 |
| 1999 | 14 | #4,864 | 7.3 |
| 1998 | 10 | #5,997 | 5.2 |
| 1997 | 15 | #4,325 | 8.0 |
| 1996 | 13 | #4,705 | 6.9 |
| 1995 | 15 | #4,125 | 7.9 |
| 1994 | 20 | #3,376 | 10.4 |
| 1993 | 24 | #2,890 | 12.2 |
| 1992 | 16 | #3,814 | 8.0 |
| 1991 | 13 | #4,320 | 6.4 |
| 1990 | 17 | #3,507 | 8.3 |
| 1989 | 9 | #5,336 | 4.5 |
| 1988 | 13 | #3,774 | 6.8 |
| 1987 | 11 | #4,068 | 5.9 |
| 1986 | 19 | #2,719 | 10.3 |
| 1985 | 19 | #2,638 | 10.3 |
| 1984 | 12 | #3,546 | 6.6 |
| 1983 | 15 | #2,982 | 8.4 |
| 1982 | 14 | #3,182 | 7.7 |
| 1981 | 22 | #2,290 | 12.3 |
| 1980 | 17 | #2,774 | 9.5 |
| 1979 | 19 | #2,501 | 11.0 |
| 1978 | 7 | #4,739 | 4.3 |
| 1977 | 18 | #2,497 | 11.0 |
| 1976 | 16 | #2,646 | 10.2 |
| 1975 | 15 | #2,684 | 9.6 |
| 1974 | 13 | #2,865 | 8.3 |
| 1973 | 12 | #2,920 | 7.7 |
| 1972 | 20 | #2,039 | 12.3 |
| 1971 | 15 | #2,497 | 8.5 |
| 1970 | 9 | #3,380 | 4.8 |
| 1969 | 13 | #2,474 | 7.3 |
| 1968 | 13 | #2,382 | 7.5 |
| 1967 | 11 | #2,539 | 6.3 |
| 1966 | 18 | #1,849 | 10.1 |
| 1965 | 8 | #3,096 | 4.3 |
| 1964 | 10 | #2,738 | 5.0 |
| 1963 | 17 | #1,999 | 8.4 |
| 1961 | 15 | #2,181 | 7.1 |
| 1960 | 14 | #2,260 | 6.6 |
| 1959 | 13 | #2,344 | 6.1 |
| 1958 | 10 | #2,714 | 4.7 |
| 1957 | 13 | #2,318 | 6.0 |
| 1956 | 14 | #2,209 | 6.6 |
| 1955 | 14 | #2,178 | 6.8 |
| 1954 | 21 | #1,679 | 10.3 |
| 1953 | 5 | #4,056 | 2.5 |
| 1952 | 15 | #2,036 | 7.7 |
| 1951 | 17 | #1,871 | 9.0 |
| 1950 | 21 | #1,630 | 11.7 |
| 1949 | 10 | #2,520 | 5.6 |
| 1948 | 17 | #1,848 | 9.7 |
| 1947 | 18 | #1,815 | 9.8 |
| 1946 | 9 | #2,612 | 5.5 |
| 1945 | 5 | #3,526 | 3.7 |
| 1944 | 9 | #2,537 | 6.6 |
| 1943 | 5 | #3,772 | 3.5 |
| 1942 | 9 | #2,608 | 6.5 |
| 1941 | 17 | #1,721 | 13.8 |
| 1940 | 13 | #2,030 | 11.2 |
| 1939 | 12 | #2,114 | 10.8 |
| 1938 | 12 | #2,129 | 10.8 |
| 1937 | 16 | #1,794 | 15.0 |
| 1936 | 7 | #3,013 | 6.7 |
| 1935 | 13 | #2,083 | 12.5 |
| 1934 | 13 | #2,071 | 12.6 |
| 1933 | 12 | #2,149 | 12.1 |
| 1932 | 15 | #1,957 | 14.4 |
| 1931 | 7 | #3,237 | 6.7 |
| 1930 | 16 | #1,925 | 14.6 |
| 1929 | 24 | #1,502 | 22.3 |
| 1928 | 13 | #2,329 | 11.7 |
| 1927 | 16 | #2,082 | 14.2 |
| 1926 | 15 | #2,131 | 13.5 |
| 1925 | 14 | #2,254 | 12.5 |
| 1924 | 8 | #3,368 | 7.1 |
| 1923 | 20 | #1,787 | 18.2 |
| 1922 | 9 | #3,126 | 8.3 |
| 1921 | 7 | #3,695 | 6.4 |
| 1920 | 5 | #4,613 | 4.7 |
| 1919 | 5 | #4,469 | 5.1 |
| 1918 | 10 | #2,780 | 9.9 |
| 1917 | 9 | #2,841 | 9.7 |
| 1916 | 8 | #3,048 | 9.0 |
| 1915 | 8 | #2,942 | 9.4 |
| 1913 | 5 | #3,037 | 9.8 |
Ranks and shares: boys’ names in each year’s SSA file; share of all boys SSA recorded that year.
Is Isidoro a boy’s or a girl’s name?
Isidoro has been recorded only for boys: SSA lists no girls with the name in 102 years of records (it lists a name only in years with 5 or more babies of a sex).
Girls and boys named Isidoro: the SSA national file counts each sex separately.
How many people are named Isidoro, and how old are they?
An estimated 841 Americans named Isidoro and born in the U.S. are alive in 2026 (65% of everyone recorded); the median is 44 years old and half are between 30 and 60. An estimate from SSA’s births and life tables, not a count.
The 2020 Census counted 2,554 people named Isidoro (9 women and girls, 2,545 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 890 born in the U.S. The Census count is 2.9 times 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.
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 Isidoro born?
The states with the most babies named Isidoro are Texas, California and New Mexico, with 98% of its births recorded by state since 1910; New Mexico is not among the ten states with the most births.
| State | Since 1910 | Rank, boys | vs. national |
|---|---|---|---|
| Texas | 424 | not ranked | 4.7× |
| California | 140 | not ranked | 1.2× |
| New Mexico | 11 | not ranked | 1.3× |
| Illinois | 5 | not ranked | 0.1× |
| New York | 5 | not ranked | 0.1× |
Where Isidoro is more common than its national share predicts
Relative to its national share, Isidoro is most over-represented in Texas: since 1913 it was given 4.7 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 Isidoro 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 4 names spelled alike, given to 18,833 babies since 1880, Isidoro is the fourth most given (6.9% of them). In 2025 none of their 134 babies recorded by SSA was a Isidoro (SSA lists a name only with 5 or more babies of one sex).
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 Isidoro
Names whose births rose and fell across the same decades, measured on each decade’s share of births.
| Name | Recorded | 1910-2025 |
|---|---|---|
| Narciso | 2,078 | |
| Cesario | 1,064 | |
| Magdaleno | 1,014 | |
| Rosalio | 2,063 | |
| Bernardino | 1,649 | |
| Candelario | 2,319 |
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 Isidoro and names like it
- Compare Isidoro and IsidroBirths, ranks, peak and the living estimate side by side.
- The most given names of the 1920sIsidoro peaked in 1929.
- Texas’s most given namesThe state where SSA recorded the most babies named Isidoro since 1910.
- Spanish namesWiktionary’s origin for Isidoro: every such name, by how often it is given.
- The top names of 1929The year the most babies were named Isidoro.
- The names of the MillennialsMost people named Isidoro alive today were born 1981-1996.
- Names starting with IMost given first.