Laurence Yeomans Cairns QC (May 19, 1892 – July 27, 1967) was a Canadian lawyer and judge.
He attended the University of Alberta, graduating in its inaugural class of 1912 with a Bachelor of Arts degree.
In 1915, he earned a Doctor of Laws (LLB) degree from the university.
Cairns also served as an Edmonton Public School Board trustee in the 1930s, and as Chairman of the Edmonton Public School Board.
Cairns contested the 1940 Alberta general election for the Edmonton electoral district as an independent, while he came sixth in first ballot votes, he would not receive enough support on later ballots to be elected.