Kaczynski or Kaczyński (; feminine: Kaczyńska, plural: Kaczyńscy) is a Polish-language surname. Its Lithuanian equivalent is Kačinskas.

{| class="wikitable"

! Language !! Masculine !! Feminine

|-

| Polish || Kaczyński || Kaczyńska

|-

| Lithuanian || Kačinskas || Kačinskienė (married)<br> Kačinskaitė (unmarried)

|-

| Russian <br>(Romanization) || <br> (Kachinskiy, Kachinsky) || <br> (Kachinskaya)

|}

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 1955), American politician

See also

  • Kaczynski towers, Espace Léopold, Brussels, Belgium
  • Kuczynski
  • Kuczyńskie
  • Kucinski
  • Kulczyński