Andreasyan () is an Armenian surname derived from the given name Andreas, equivalent to English Anderson. Notable people with the surname include:
Arkady Andreasyan (1947–2020), Soviet-Armenian football player Karen Andreasyan (born 1977), Armenian lawyer and minister Sarik Andreasyan (born 1984), Russian-Armenian film director Zhanna Andreasyan (born 1981), Minister of Education, Science, Culture and Sport