Dia
Recorded 1948–2025 · United States
Dia was most popular in 2015, when 62 American babies were given the name — ranking #4,883 that year. In 2025 it ranked #7,270, with 34 births. Across 1880–2025 the Social Security Administration has recorded 2,367 people named Dia.
Dia over time
How old is the name Dia?
Dia first appears in Social Security Administration records in 1948, which makes it about 77 years old as a recorded American name. It has been recorded in 76 of the 78 years since.
How many people are named Dia?
The Social Security Administration has recorded 2,367 American births named Dia between 1880 and 2025. That is recorded US births, not a world population — it counts people issued a Social Security number at birth in the United States. Of those, roughly 2,279 are estimated to be alive today.
How many babies were named Dia in 2025?
34 American babies were named Dia in 2025, ranking #7,270 that year.
Is Dia getting more or less popular?
Dia is holding steady. Across 2021–2025 it averaged 45 births a year, against 56 a year across 2011–2015 — a change of -20% over the decade.
Measured on recorded births. American births overall have fallen since 2007, so most established names lose births over any recent decade — a name can shed births and still hold its rank. Compare the rank above, which is measured against the other names of the same year.
Is Dia a boy’s or a girl’s name?
Across the whole record Dia is a girl’s name — 95.1% of the 2,367 Americans given it were girls and 4.9% were boys. In births since 2016 it is 98% girls and 2% boys.
Counted from every US birth the Social Security Administration recorded under this name, so it reflects use rather than opinion. A name given to fewer than five babies of one sex in a year is withheld at source and is not counted.
How old is someone named Dia?
Roughly 2,279 Americans named Dia are alive today — 96% of everyone ever recorded with the name. The median is 30 years old, and half are between 13 and 50. That is a wide band, the mark of a name in steady use across generations rather than a passing fashion.
An estimate, not a count. Recorded births are carried forward through the Social Security Administration’s 2023 period life table, by age and sex. That table describes mortality in one recent year, so it credits the oldest cohorts with today’s survival rather than the harsher rates they actually lived through — the further back a name peaked, the more this will overstate how many remain. It counts people issued a Social Security number at birth, not immigrants who arrived later.
Where Dia is most concentrated
How much more common the name is in each state than across the country as a whole.
Explore further
See Dia on the interactive charts
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Source: U.S.A. Social Security Administration. Years 1880–2025. namelegacy.org