Kaczynski or Kaczyński (; feminine: Kaczyńska, plural: Kaczyńscy) is a Polish-language surname. Its Lithuanian equivalent is Kačinskas.
People
Aleksandra Kaczyńska (born 1954), Polish rower
Andrew Kaczynski (born 1989), American journalist and political reporter for CNN
Bogusław Kaczyński (born 1942–2016), Polish classical music journalist
David Kaczynski (born 1949), American activist, Theodore Kaczynski's brother
Filip Kaczyński (born 1987), Polish politician
Jarosław Kaczyński (born 1949), Polish politician, former prime minister of Poland Lech Kaczyński (1949–2010), Polish politician, former president of Poland, Jarosław Kaczyński's twin brother Maria Kaczyńska (1942–2010), Polish economist, Lech Kaczyński's wife Richard Kaczynski (born 1963), American writer Ryszard Kaczyński (born 1954), Polish politician Sophie Kaczynski, character from 2 Broke Girls, played by Jennifer Coolidge Stanislaus Katczinsky, All Quiet on the Western Front character Ted Kaczynski (1942–2023), American mathematician, social critic, and serial terrorist mail-bomber known as the Unabomber Thomas Kaczynski Jr. (born c. 1955), American politician