The Kincardine and Deeside by-election was a parliamentary election held in Kincardine and Deeside, Scotland, on 7 November 1991, caused by the death of the Conservative Member of Parliament, Alick Buchanan-Smith on 29 August 1991.

1991 Kincardine and Deeside by-election

← 1987 7 November 1991 1992 →
Constituency of Kincardine and Deeside
Turnout	67.0% ( 8.2%)
First party Second party   Candidate Nicol Stephen J. M. Marcus Humphrey Party Liberal Democrats Conservative Popular vote 20,779 12,955 Percentage 49.0% 30.6% Swing 12.7% 10.1%   Third party Fourth party   Candidate Allan Macartney Malcolm Savidge Party SNP Labour Popular vote 4,705 3,271 Percentage 11.1% 7.7% Swing 4.7% 8.2%
MP before election Alick Buchanan-Smith Conservative Subsequent MP Nicol Stephen Liberal Democrats

The result was a Liberal Democrat gain from the Conservatives, with Nicol Stephen elected as the new MP. Stephen held the seat until the 1992 general election when it was regained by the Conservatives. The SNP candidate Allan Macartney went on to be elected as the MEP for North East Scotland (European Parliament constituency) at the 1994 European Parliament election in the United Kingdom, a position he retained until his death in 1998. The Labour candidate, Malcolm Savidge, who finished in fourth place at this by-election, went on to be elected as the MP for Aberdeen North at the 1997 general election. Nicol Stephen was elected as Member of the Scottish Parliament for Aberdeen South in 1999 and became Leader of the Scottish Liberal Democrats in 2005.

It was held on the same day as a by-election in Langbaurgh, which the Conservatives also lost.