Guy W. Selby (April 1871 – May 9, 1968) was a Michigan, United States, politician.
He was elected as the Mayor of the City of Flint in 1909 for the first of two 1 year terms. defeating the incumbent. In the 1910 election, he defeated former mayor Austin D. Alvord.
In 1916, Selby was president of the Genesee County Bar Association.