Leif Zeilon is a Swedish politician, and is one one of the founders of the Sweden Democrats (Swedish: Sverigedemokraterna) and Bevara Sverige Svenskt.
During the 1970s he was active in Demokratisk Allians (DA), which was a reaction to the communist demonstrations for a North Vietnamese invasion of South Vietnam. In 1988 he was one of the founders as well as the leaders of the populist party Sweden Democrats and wrote its program. In 1992 he left Sweden Democrats and according to some sources founded Hembygdspartiet.