The 1958 Torrington by-election, in Devon, England, was the first gain by the British Liberal Party at a by-election since Holland with Boston in 1929. The election was caused by the accession of George Lambert, National Liberal and Conservative Member of Parliament for Torrington to a hereditary peerage as Viscount Lambert. He had held the constituency since its creation in 1950, with large majorities over Labour Party candidates. The Liberal Party had only contested the seat in 1950, although they then came second, with 25% of the vote. Lambert's father, also George Lambert, had held the predecessor seat of South Molton for much of its history, initially as a Liberal, but then as a National Liberal.