Masako
Masako was last recorded in 1993, when 5 babies were given it; 821 Americans have been recorded with it between 1909 and 1993 (Social Security Administration, published May 2026).
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Masako by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
How popular is Masako?
Unranked in 2025
Its last girls’ rank on record is #14,909, in 1993; SSA lists a name only in years with 5 or more births.
58 babies in 1921, the peak
Masako peaked in 1921, when 58 girls were given it, #981 among girls’ names. It was not recorded in 2025.
| Year | Births | Rank | Per million girls |
|---|---|---|---|
| 1993 | 5 | #14,909 | 2.8 |
| 1976 | 7 | #7,804 | 4.8 |
| 1971 | 5 | #9,116 | 3.0 |
| 1943 | 5 | #5,119 | 3.6 |
| 1940 | 5 | #4,812 | 4.4 |
| 1937 | 9 | #3,086 | 8.5 |
| 1936 | 7 | #3,602 | 6.7 |
| 1935 | 12 | #2,527 | 11.4 |
| 1934 | 17 | #1,971 | 16.3 |
| 1933 | 13 | #2,360 | 12.9 |
Every recorded year (33)
| Year | Births | Rank | Per million girls |
|---|---|---|---|
| 1932 | 10 | #2,973 | 9.4 |
| 1931 | 14 | #2,268 | 13.1 |
| 1930 | 27 | #1,518 | 24.0 |
| 1929 | 28 | #1,472 | 25.1 |
| 1928 | 24 | #1,716 | 20.8 |
| 1927 | 37 | #1,323 | 31.0 |
| 1926 | 31 | #1,472 | 26.2 |
| 1925 | 30 | #1,525 | 24.6 |
| 1924 | 39 | #1,295 | 31.2 |
| 1923 | 39 | #1,260 | 32.3 |
| 1922 | 53 | #1,041 | 44.1 |
| 1921 | 58 | #981 | 47.0 |
| 1920 | 47 | #1,098 | 39.2 |
| 1919 | 55 | #962 | 48.7 |
| 1918 | 43 | #1,145 | 37.1 |
| 1917 | 31 | #1,325 | 28.7 |
| 1916 | 36 | #1,205 | 34.5 |
| 1915 | 34 | #1,182 | 34.6 |
| 1914 | 34 | #1,030 | 44.6 |
| 1913 | 34 | #921 | 54.4 |
| 1912 | 18 | #1,278 | 32.3 |
| 1911 | 8 | #1,898 | 19.1 |
| 1909 | 6 | #2,147 | 17.3 |
Ranks and shares: girls’ names in each year’s SSA file; share of all girls SSA recorded that year.
Is Masako a boy’s or a girl’s name?
Masako has been recorded only for girls: SSA lists no boys with the name in 33 years of records (it lists a name only in years with 5 or more babies of a sex).
Girls and boys named Masako: the SSA national file counts each sex separately.
How many people are named Masako, and how old are they?
An estimated 45 Americans named Masako 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 2,086 people named Masako (2,083 women and girls, 3 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 99 born in the U.S. The Census count is 21.1 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 Masako born?
The states with the most babies named Masako are Hawaii, California and Washington, with 100% of its births recorded by state since 1910; Hawaii and Washington are not among the ten states with the most births.
| State | Since 1910 | Rank, girls | vs. national |
|---|---|---|---|
| Hawaii | 349 | not ranked | 106.5× |
| California | 298 | not ranked | 11.8× |
| Washington | 37 | not ranked | 4.3× |
Where Masako is more common than its national share predicts
Relative to its national share, Masako is most over-represented in Hawaii: since 1910 it was given 106.5 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 girls’ 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 Masako 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 Masako
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 Masako and names like it
- Compare Masako and MafaldaBirths, ranks, peak and the living estimate side by side.
- The most given names of the 1920sMasako peaked in 1921.
- Hawaii’s most given namesThe state where SSA recorded the most babies named Masako since 1910.
- The top names of 1921The year the most babies were named Masako.
- Names starting with MMost given first.