Masahiro
Masahiro was last recorded in 2014, when 5 babies were given it; 63 Americans have been recorded with it between 1925 and 2014 (Social Security Administration, published May 2026).
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Masahiro by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
What does Masahiro mean?
Wiktionary, English section
Masahiro is “a male given name from Japanese.”
Borrowed from Japanese まさひろ (Masahiro).
Meaning: Wiktionary, English section, as of Sep 25, 2026 (CC BY‑SA 4.0).
How popular is Masahiro?
Unranked in 2025
Its last boys’ rank on record is #13,337, in 2014; SSA lists a name only in years with 5 or more births.
9 babies in 1998, the peak
Masahiro peaked in 1998, when 9 boys were given it, #6,640 among boys’ names. It was not recorded in 2025.
| Year | Births | Rank | Per million boys |
|---|---|---|---|
| 2014 | 5 | #13,337 | 2.6 |
| 2012 | 6 | #11,745 | 3.2 |
| 2003 | 5 | #12,074 | 2.5 |
| 1998 | 9 | #6,640 | 4.7 |
| 1994 | 6 | #8,412 | 3.1 |
| 1992 | 6 | #8,087 | 3.0 |
| 1990 | 7 | #6,900 | 3.4 |
| 1989 | 6 | #7,577 | 3.0 |
| 1927 | 5 | #4,579 | 4.4 |
| 1925 | 8 | #3,305 | 7.2 |
Ranks and shares: boys’ names in each year’s SSA file; share of all boys SSA recorded that year.
Is Masahiro a boy’s or a girl’s name?
Masahiro has been recorded only for boys: SSA lists no girls with the name in 10 years of records (it lists a name only in years with 5 or more babies of a sex).
Girls and boys named Masahiro: the SSA national file counts each sex separately.
How many people are named Masahiro, and how old are they?
An estimated 49 Americans named Masahiro and born in the U.S. are alive in 2026, too few to state an age range. An estimate from SSA’s births and life tables, not a count.
The 2020 Census counted 644 people named Masahiro (1 woman or girl, 643 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 50 born in the U.S. The Census count is 12.9 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).