Declining since 2002, #5,410 for girls today.
Popularity of Kasia since 1958
Babies named Kasia per year in U.S. Social Security records.
Data table (by decade)
| Decade | Girls |
|---|---|
| 1950s | 5 |
| 1960s | 28 |
| 1970s | 115 |
| 1980s | 246 |
| 1990s | 371 |
| 2000s | 551 |
| 2010s | 282 |
| 2020s | 127 |
Meaning & origin
Kasia, the Polish diminutive of Katarzyna, entered U.S. records in 1958 and peaked at rank 5,410 in 2002. Since then, its usage has declined, reflecting a trajectory of falling popularity. In 2025, the name was given to approximately 1 in every 69,881 girls, indicating its rarity. The name is most frequently found in Illinois, where it appears as a top state. Though uncommon in the U.S., Kasia remains a beloved choice in Poland, often used as a standalone name rather than a nickname. Its melodic sound and cultural ties make it a distinctive option for families with Polish heritage.
Kasia is a Polish diminutive of Katarzyna, the Polish form of Katherine. Katherine derives from the Greek name Aikaterine, whose ultimate origin is debated; it is most commonly associated with the Greek word katharos, meaning 'pure'. The name Kasia has been used in Poland since at least the 19th century, often as an independent given name.
Where Kasia is most popular
Births per 100,000 girls by state, 2025. The lightest shade means too few recorded births.
Nicknames & variants
Nicknames: Kasieńka, Kaśka
Sibling names for Kasia
Names that share Kasia's style, for a brother or sister.
