Charlotte Girl
SHAHR-luht
“free man” · French
#2
Kasia
GirlPolish, Greek· “Polish pet form of Katarzyna”
- Meaning
- Polish pet form of Katarzyna
- Origin
- Polish, Greek
- Pronunciation
- KAH-shuh
- Syllables
- 2
- US rank 2025
- #5,481
- US babies 2025
- 23
- Best rank
- #2,296 (2002)
- Peak year
- 2002
Meaning and origin of Kasia
Kasia is a Polish and Greek name that is usually said to mean “Polish pet form of Katarzyna”.
Kasia is a Polish pet form of Katarzyna, the Polish form of Katherine. Katherine is a Greek name of uncertain meaning that later became linked to katharos, pure. In Polish the si is said like sh, so Kasia is said KAH-shuh, which surprises English readers who expect KAY-see-uh. The name is used in Poland as an everyday form of Katarzyna, much as Kate or Katie is used in English. In the United States it is found mostly in Polish American families. Kasha and Kaska are other Polish pet forms of the same name.
Popularity over time
Kasia first appears in US Social Security records in 1958. It has never ranked in the national top 1,000, which keeps it genuinely uncommon. Its best national rank was #2,296 in 2002, the same year it reached its highest count of 71 babies. In 2025, 23 babies were named Kasia, and it ranked #5,481 nationally. Its use has been fairly steady over the past decade.
Its national rank moved from #3,909 in 1980, #2,760 in 2000, #3,341 in 2010, and #5,481 in 2025. Of the 1,725 US girls named Kasia since records began, 32% were born in the 2000s, its biggest decade. The 1990s come next, with 371 babies. Since 2010, 409 more have been named Kasia.
Other girls' names that peaked around the same time include Mackenzy, Indira, Ishika, Anusha, and Dyani.
Where it is most popular (2025)
In 2025, Kasia ranked highest in Illinois.
| State | Rank there | Babies |
|---|---|---|
| Illinois | #1518 | 5 |
Gender, sound and spelling
In the US it is used almost only for girls.
Kasia is usually pronounced KAH-shuh, with two syllables. It has five letters, starts with K and ends in “-ia”.
Middle names for Kasia
A few middle names that flow with Kasia: each avoids a matching first letter, a rhyme and a vowel clash where the names meet.
Sibling names for Kasia
Similar names
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Lists that include Kasia
Frequently asked questions
What does the name Kasia mean?
Kasia is a Polish and Greek name that is usually said to mean “Polish pet form of Katarzyna”.
What is the origin of the name Kasia?
Kasia has Polish and Greek roots. Kasia is a Polish pet form of Katarzyna, the Polish form of Katherine.
Is Kasia a popular name?
Not especially. Kasia ranked #5,481 in the US in 2025, which puts it outside the top 1,000.
Is Kasia a boy or girl name?
Kasia is mainly a girl's name. In the US it is used almost only for girls.
How do you pronounce Kasia?
Kasia is usually pronounced KAH-shuh. Stressed syllables are in capital letters.
Popularity figures come from US Social Security card applications (names given to at least five babies in a year, 1880 to 2025). How we source names and meanings