Given name & surname
Kasia
“a vigilant woman”·“one who is pure; virginal”
Kasia is a variant of Kasey. In Irish use, Kasey carries the interpretation “a vigilant woman.” In Polish use, Kasia is an affectionate form of Katherine. In Greek use, Katherine carries the interpretation “one who is pure; virginal.”
Meaning & origin
What it means
Kasia is a variant of Kasey. In Irish use, Kasey carries the interpretation “a vigilant woman.” In Polish use, Kasia is an affectionate form of Katherine. In Greek use, Katherine carries the interpretation “one who is pure; virginal.”
Explained through its name family
Where it comes from
Kasia is a diminutive of Katarzyna. Katarzyna comes from Latin.
Adapted from Wiktionary (CC BY-SA 4.0)
How it developed
In Polish use, Kasia is used as an affectionate form of Katarzyna.
The story
Published U.S. birth records include this spelling as early as 1958. This is the earliest published observation available here, rather than a date for the name’s origin. In Polish use, Kasia is an affectionate form of Katherine. The history of Katherine gives this family its wider story. Katherine’s historical associations include Catherine de’ Medici, wife of King Henry II and regent.
Combines direct and name-family evidence
Kasia through the years
- Babies since 1880
- 1,725
- 0 boys · 1,725 girls
- Most popular year
- 2002
- 71 babies
- 2025
- 23
- #5,481 for girls
- 2021–25 vs 2016–20
- −9%
- Steady
Where it’s given
By the numbers
In 2025, this name appeared in 23 U.S. birth records for girls, ranking No. 5,481 among girls’ names. Average annual use for girls was 8.8% lower in 2021–2025 than in 2016–2020. Its largest published annual count for girls was 71 in 2002. In 2025, Illinois had the largest reported state-level birth count for girls with this name (5). Published U.S. population figures for this spelling include 2,016 as a first name in 2020.
From Social Security birth records and U.S. Census name counts for this exact spelling. Other spellings are counted separately.
Kasia’s family of names
Kasia is an affectionate form of Katherine. In Polish usage, Kasia has a conventional equivalent in the English form Cathy. Kasia has a related form in Kasey.
Inner ring: spellings · middle: nicknames and forms · outer: across languages.
Around the world
Kasia has relatives in 5 languages.
8 related names in 5 languages. Point at a dot, or tab to the map and use the arrow keys.
Nicknames & forms 5
Diminutives, pet forms, short forms and variants used alongside the name.
Spellings & scripts 4
The same name written differently, including transliterations into other scripts.
Across languages 6
Equivalents and cognates in other languages, plus older forms it grew from.
See also 1
Names our sources mention alongside this one. They are related in story or meaning, not forms of this name.
People named Kasia
- Kasia MośPolish singer, songwriter, and dancerborn 1987
- Kasia SmutniakPolish actress and model (1979)
- Kasia KowalskaPolish singerborn 1973
- Kasia StrussPolish modelborn 1987
- Kasia Gruchalla-WesierskiCanadian rowerborn 1991
- Kasia AdamikPolish film director and storyboard artistborn 1972
- Kasia NosowskaPolish singerborn 1971
- Kasia KuleszaCanadian synchronized swimmerborn 1976
- Kasia CerekwickaPolish singerborn 1980
Listed by how widely each person is written about, which says nothing about the name itself.
Similar names
If you love Kasia, these share its style, era, origin or sound, from outside its own family.
Katerina
“one who is pure; virginal”
>99% girls
Katheryn
“one who is pure; virginal”
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Kyra
“little dark-haired one” · “a king”
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Kathrina
“one who is pure; virginal”
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Kara
“one who is pure” · “dearly loved”
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Kimberlyn
“of the royal fortress”
>99% girls
Kimberleigh
“of the royal fortress”
>99% girls
Cira
“a king”
>99% girls