Sim Var (Khmer: ស៊ឹម វ៉ា; 2 February 1906 – October 1989) was a Cambodian politician. He served as Prime Minister of Cambodia from July 1957 to January 1958. Together with Chhean Vam and Ieu Koeus, he co-founded the Democratic Party in April 1946. A nationalist, Sim Var opposed the French rule over Cambodia and led opposition movements with other nationalists. Sim Var was Cambodia's Ambassador to Japan during the 1970s.