Hallvard Eika (5 December 1920 – 17 May 1989) was a Norwegian politician for the Liberal Party. He was elected to the Norwegian Parliament from Telemark in 1969, and was re-elected on one occasion. During his first term he served twice in different cabinets. On 21 August 1970 he was appointed Minister of Agriculture during the centre-right cabinet Borten, replacing Bjarne Lyngstad. He held the position until the cabinet Borten fell in 1971. Meanwhile, Eika was busy with his appointment to the Borten cabinet, Sigurd Kalheim took his seat in Parliament.