Fillmore is a city in Millard County, Utah, United States. The population was 2,253 at the 2000 census. It is the county seat of Millard County. It is named for the thirteenth US President Millard Fillmore.
From 1851 to 1856, Fillmore was the capital of Utah Territory. The original Utah Territorial Statehouse still stands.
Fillmore, located near the geographic center of the territory, was originally built as the capital of Utah Territory. The Utah Territorial Legislature approved a plan to locate the capital in the Pauvant Valley. On October 28, 1851 Utah governor Brigham Young chose the specific site for Fillmore. Jesse W. Fox that same day surveyed the town.