Francis Mills Case (June 22, 1822 - December 12, 1892) was an American politician. Case was born in Eagleville, Ashtabula County, Ohio. He studied, first in Ohio, then in 'eastern schools' where he attained a degree in civil engineering. He first traveled to Colorado Territory in 1860 as part of the Union Pacific Railroad Survey. In March 1861, President Abraham Lincoln appointed him as the first Surveyor General of Colorado Territory. In 1870, he worked as chief engineer of the Kansas Pacific Railroad. He served as the 11th mayor of Denver, Colorado from 1873 to 1874. He was later a partner in the real estate firm Case and Ebert, through which he profited handsomely on Denver's repeated mineral booms. Case died in Findlay,, Ohio and is interred at Denver's Fairmount Cemetery