Kacey
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Meaning
variant of Casey, from Irish Cathassach, 'vigilant'
The story
Kacey is a variant of Casey, says Behind the Name, and Casey is the Irish surname Anglicized from Ó Cathasaigh, a patronymic from the given name Cathassach, "vigilant" in Irish; the surname entry adds that Casey can be given in honor of Casey Jones, the train engineer who died in 1900 saving his passengers. The K-spelling has run on both sides of the American ledger for sixty years: girls from about 1,037 in the 1970s to about 3,158 in the 1990s and about 1,223 so far this decade; boys in the hundreds for decades, now about 1,190 so far in this one. So far this decade the two lanes sit nearly even. A vigilant Irishman at the root, a folk-hero engineer on the line, and a spelling both sides now claim in nearly equal numbers.
How popular is Kacey around the world?
In the United States, 2,413 babies were named Kacey between 2020 and 2025. In Canada, 48 girls named Kacey were born in 2024, the 597th most common name among girls that year.
Kacey is on the official records of the United States, Canada, Scotland, South Australia and England and Wales.
United States
1 in 9,000
In the United States, 2,413 babies were named Kacey between 2020 and 2025.
Shape drawn from US Social Security baby-name records. Kacey peaked in the 2010s and the 2020s in nearly equal measure.
Births with a Social Security record. Source: U.S. Social Security Administration
Canada
1 in 4,200
In Canada, 48 girls named Kacey were born in 2024, the 597th most common name among girls that year.
In Canada, 39 boys named Kacey were born in 2024, the 697th most common name among boys that year.
share of that year’s name registrations
First given names from provincial and territorial vital statistics across Canada; any name-sex-year under 5 is excluded at source, and small Quebec counts carry a randomized adjustment made at source. Shares divide by Statistics Canada’s count of live births for the year; the 2024 count is preliminary. Source: Statistics Canada, first names at birth (table 17-10-0147-01)
Scotland
1 in 11,000
In Scotland, 4 girls named Kacey were registered in 2024, the 638th most common name among girls that year.
share of that year’s name registrations
Births registered in Scotland; different spellings count separately but accents are merged at source, and any spelling under 3 in total is suppressed. Source: National Records of Scotland, babies' first names
South Australia
1 in 18,0002017
In South Australia, 1 boy was registered as Kacey in 2017.
The count never rose above 2 in a year, too few to chart.
Births registered in South Australia (not all of Australia) by first name and year of registration, 1944–2017, from the state’s Births, Deaths and Marriages registry, which publishes every name down to a single birth in capitals; a spelling its export repeats inside a year is counted once, and from 2018 only a top 100 is published, so the series ends at 2017. Source: Consumer and Business Services (South Australia), popular baby names
England and Wales
1 in 23,000
In England and Wales, 16 boys named Kacey were born in 2025, ranked 1,613th among boys that year.
In England and Wales, 10 girls named Kacey were born in 2025, ranked 2,605th among girls that year.
share of that year’s name registrations
Birth registrations in England and Wales (not the whole UK); exact spellings are counted separately, and any spelling under 3 in a year is withheld at source. Source: Office for National Statistics, baby names in England and Wales
Austria
last on record 2011
Kacey is not on the 2025 record for Austria, which publishes every first name down to a single birth, so the name was not given there that year.
The count never rose above 1 in a year, too few to chart.
Live births in Austria by year of birth, 1984–2025, from Statistik Austria’s first-name statistics; spellings that differ only by special characters are counted together (umlauts stay apart), every name down to a single birth is published, and the count covers babies with Austrian citizenship only until 2009, every baby from 2010, and from 2015 also births abroad to mothers living in Austria. Shares divide by Statistik Austria’s count of live births from 2010, and before that by the file’s own total for the year. Source: Statistik Austria - data.statistik.gv.at (OGDEXT_VORNAMEN_1, updated 2026-07-09)
Ireland
last on record 2023
Kacey is not on the 2025 record for Ireland, where names under 3 in a year are withheld at source.
share of that year’s name registrations
Exact registered spellings from Irish vital statistics; any name under 3 in a year is withheld at source, and accented spellings (fadas) are recorded reliably only from 2018. Source: Central Statistics Office (Ireland), Irish babies' names
Not on the record in Spain, Mexico City, Argentina, Puerto Rico, New Zealand and Poland: those registries withhold small counts, so rare uses may sit below their floors.
Not on the Chile record: nametree keeps spellings that reached 5 registrations in some year, so rarer uses are not shown. Not on the Montevideo record for 1940 to 2011: that registry withholds nothing, so this spelling was not given there in those years. Not on the France record: nametree keeps spellings that reached 20 births in some year, so rarer uses are not shown. Not on Norway’s list: Statistics Norway lists only first names carried by 200 or more living people, so rarer names are not shown.
When you meet Kacey
Most people given the name Kacey in the United States were born between 1980 and 2019. The Kacey you meet today is most often in her 20s or 30s.
Estimated from US Social Security birth registrations and typical lifespans; a rough guide, not a rule.
The Kacey deep dive
Whether you’re naming a baby or exploring your own name’s history, this is a personal letter, not a list: where Kacey truly comes from, how it traveled, and what a century of records reveals. If you have grown a tree on nametree, it also considers how Kacey fits with your family’s names and surname.
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