Apolinaras Grigas (Russian: Аполинарас Григас; born 3 September 1945) is a Lithuanian rower who competed for the Soviet Union.
Grigas was born in Kaunas, Lithuania.[1] At the 1967 European Rowing Championships in Vichy, he won silver with the men's eight.[2] He competed at the 1968 Summer Olympics in Mexico City with the men's coxless pair where they did not finish in the round one repêchage.[1][3] At the 1971 European Rowing Championships in Copenhagen, he won bronze with the men's eight.[2] At the 1973 European Rowing Championships in Moscow, he won silver with the men's coxless four.[4]