Olav Osolin (born November 13, 1953 in Tallinn) is an Estonian journalist, advertisement figure, radio and television personality and actor.

In 1977 he graduated from Tartu State University in Estonian philology. 1977-1981 he worked as a journalist at Eesti Raadio. Since 1981 he has worked mainly in advertisement industry. 1982-1988 he worked at Eesti Reklaamfilm, and 1988–1991 in video company ERF Video SP. 2007-2011 he was one of the owners and the leader of advertisement agency Zavod BBDO.

He has also produced and appeared as an actor in several films and television series, including the 1963 Igor Yeltsov directed feature film drama Ühe katuse all as the character Priit Arro, as Olari "Mörr" Ernesaks in the 2011 Andres Maimik and Rain Tolk directed comedy film Kormoranid ehk Nahkpükse ei pesta, and a recurring role in the TV3 mystery-drama series Merivälja in 2017. Since 2013, he has been a judge on the TV3 celebrity talent competition series Su nägu kõlab tuttavalt.

In 2018 he was awarded with Order of the White Star, IV class.