Recorded 1956–2025 · United States
Kacy was most popular in 1990, when 222 American babies were given the name — ranking #1,518 that year. In 2025 it ranked #9,648, with 22 births. Across 1880–2025 the Social Security Administration has recorded 6,047 people named Kacy.
Kacy first appears in Social Security Administration records in 1956, which makes it about 69 years old as a recorded American name. It has been recorded in 69 of the 70 years since.
The Social Security Administration has recorded 6,047 American births named Kacy 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 5,863 are estimated to be alive today.
22 American babies were named Kacy in 2025, ranking #9,648 that year.
Kacy is falling. Across 2021–2025 it averaged 26 births a year, against 48 a year across 2011–2015 — a change of -45% 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.
Across the whole record Kacy is mostly a girl’s name — 83.5% of the 6,047 Americans given it were girls and 16.5% were boys. It changed hands: since 1969 it has gone mainly to girls, having gone mainly to boys before that. In births since 2016 it is 76% girls and 24% 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.
Roughly 5,863 Americans named Kacy are alive today — 97% of everyone ever recorded with the name. The median is 36 years old, and half are between 26 and 44.
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.
How much more common the name is in each state than across the country as a whole.
See Kacy on the interactive charts
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Source: U.S.A. Social Security Administration. Years 1880–2025. namelegacy.org