Jack Walter Peltason (August 29, 1923 – March 21, 2015) was the president of the University of California, and former chancellor of the University of California, Irvine. He died of Parkinson's disease in 2015. Peltason served as president of political science honors society Pi Sigma Alpha from 1978 to 1980, and was also on the executive council of the society from 1970 to 1978.