Utah State Route 126 may refer to one of the following state highways in Utah, United States:

• Utah State Route 126 (1931-1933), a former state highway in Millard County connecting Oak City with Lynndyl
• Utah State Route 126 (1933-1969), a former state highway in Beaver County connecting Greenville with SR-21 (north of Greenville)
• Utah State Route 126 (May–August 1977), a temporary renumbering of Utah State Route 82 in Box Elder County connecting Tremonton with SR-13 (east of Garland)
• Utah State Route 126, the current state highway in Davis, Weber, and Box Elder counties connecting Layton with South Willard

• List of state highways in Utah
• List of highways numbered 126

Media related to Utah State Route 126 (disambiguation) at Wikimedia Commons