Alexander Johnston (1790 – 9 May 1844) was a Scottish Whig Party politician.
He was elected at the 1841 general election as the member of parliament (MP) for Kilmarnock Burghs,[1] and held the seat until his death three years later, aged 53.
. F. W. S. Craig . British parliamentary election results 1832–1885 . 1977 . 2nd . 1989 . Parliamentary Research Services . Chichester . 0-900178-26-4 . 552.