William Robinson Baker (May 21, 1820 – April 30, 1890) was an American railroad executive and politician who served as the 29th Mayor of Houston from 1880 to 1886.

[1] He lived in New York until age 17 at which time he moved to Houston in the Republic of Texas.

[2] Baker was the first Houston mayor to hold office for three terms,[4] serving the city from 1880 through 1886.

His eldest sister, Marianna, resided with him and kept house for him until her marriage to Thomas M. Bagby.

Likewise, his sister Emily lived in Houston for a few years before her marriage to Horace D. Taylor.