Antanavičius
{{Lithuanian family name
| m = Antanavičius
| fm = Antanavičienė
| fu = Antanavičiūtė
| fs =
| origin =
| related = Polish:Antonowicz, Russian:Antonovich, Belarusian: Antanovich
| footnotes =
}}
Antanavičius is a Lithuanian language family name. The surname may refer to:
- Kazimieras Antanavičius (several persons)
- Kazimieras Antanavičius (officer), partisan in the military of Lithuania, recipient of the Order of the Cross of Vytis
- Kazimieras Antanavičius (economist) (1937–1998), signatory of the Act of the Re-Establishment of the State of Lithuania in 1990
- Valentinas Antanavičius (1936–2024), Lithuanian painter
{{surname}}
{{DEFAULTSORT:Antanavicius}}