The Kensington by-election, in Kensington, on 14 July 1988 was held after the death of Conservative Member of Parliament (MP) Brandon Rhys-Williams. Normally a relatively safe Conservative seat, it was narrowly won by Dudley Fishburn, who would go on to retain the seat in 1992.
It was the first by-election of that parliament, which had begun after the general election of June 1987, and would last until the next election in April 1992.
The results for the previous election were: