Ivanauskas is a Lithuanian-language surname,^[1] Lithuanized from the Slavic patronymic counterparts:^[2] Polish Iwanowski, Russian Ivanovsky/Ivanovskiy (Ивановский [ru]), and Belarusian Ivanoŭski (Іваноўскі [be]).

Notable people with the surname include:

• Brigita Ivanauskaitė (born 1993), Lithuanian handballer
• Jonas Ivanauskas (born 1960), Lithuanian priest
• Jurga Ivanauskaitė (1961–2007), Lithuanian writer
• Rapolas Ivanauskas (born 1998) is a Lithuanian basketball player
• Tadas Ivanauskas (1882–1970), Lithuanian zoologist and biologist
• Valdas Ivanauskas (born 1966, Lithuanian football (soccer) player and coach
• Sofija Ivanauskaitė (1867–1926), birth name of Sofija Pšibiliauskienė, Lithuanian writer
• Marija Ivanauskaitė (1872–1957), birth name of Marija Lastauskienė, Lithuanian writer

• All pages with titles containing Ivanauskas
• All pages with titles containing Ivanauskaite
• All pages with titles containing Ivanauskiene