The 1908 Leeds South by-election was a parliamentary by-election for the British House of Commons constituency of Leeds South in the West Riding of Yorkshire held on 13 February 1908.

Leeds South was a parliamentary constituency in the city of Leeds, West Yorkshire, which returned one Member of Parliament (MP) to the House of Commons of the Parliament of the United Kingdom from 1885 until it was abolished for the 1983 general election. It was then largely replaced by the new Morley and Leeds South constituency.