William Irving Latimer (August 5, 1836 – April 19, 1922) was a Michigan politician.

Latimer was born on August 5, 1836, in Dutchess County, New York.

Latimer served as the Mecosta County treasurer for three terms.

On November 3, 1896, Latimer was elected as a member of the Michigan Senate, where he represented the 25th district served from January 6, 1897, to 1900.

[2][1] Latimer married Olivia Spencer Cobb on April 8, 1863, in Kent County, Michigan.