The 1973 Ripon by-election was a parliamentary by-election held on 26 July 1973 for the British House of Commons constituency of Ripon.
The by-election took place during the 1970s Liberal revival. This seat and Isle of Ely were gained on the same day, the third and fourth Liberal gains during the Parliament. This was the first time the Liberal Party had made two by-election gains on the same day, since winning both seats in a two-member constituency at the 1899 Oldham by-election. The Party had last gained two seats, in different constituencies on the same day, at the 1896 Frome by-election and the 1896 Wick Burghs by-election held on 2 June 1896.