Halvar C. Jonson (born August 14, 1941) is a former teacher and high school principal. He was also a long serving provincial politician from Alberta, Canada. He served as a member of the Legislative Assembly of Alberta and cabinet minister in the provincial government from 1982 until 2004.
Jonson was first elected to the Alberta Legislature in the 1982 Alberta general election. He defeated Tom Butterfield from the Western Canada Concept and three other candidates to win his first term in office. His win held the Ponoka electoral district for the Progressive Conservatives. Due to redistribution of electoral district boundaries in the 1986 Alberta general election Ponoka was abolished and re-created as Ponoka-Rimbey. Jonson ran for his second term in the new electoral district and won easily defeating three other candidates. He stood for a third term in office in the 1989 Alberta general election fending off a strong challenge from Doug Hart of the New Democrats and one other candidate.