thumb|Pirc vs. [[Max Euwe|Euwe (1950)]]
Vasja Pirc ( ; ) (December 19, 1907 – June 2, 1980) was a Yugoslav and Slovenian chess player. He is best known in competitive chess circles as a strong exponent of the hypermodern defense now generally known as the Pirc Defence.
Pirc was champion of Yugoslavia five times: 1935, 1936, 1937, 1948, and 1953. He was awarded the International Master title in 1950, and the Grandmaster title in 1953. He was made an International Arbiter in 1973.