Stasia may be:

  • An informal name for the Caribbean island of Sint Eustatius
  • A diminutive for a Polish feminine first name Stanisława
  • A diminutive for a Polish feminine first name Anastazja or for Russian/Belorussian/Ukrainian Anastasia.
  • "Ciocia Stasia" (Stanisława Dorobczyk-Bałucka) from Polish TV series Klan