State Route 133 (SR-133) is a highway completely within Millard County in central Utah that connects Interstate 15 (I-15) to Kanosh while passing through Meadow.

The route serves as both communities' Main Street in its seven-mile (11 km) span.

From the southern terminus at the southern city limits of Kanosh, the route runs north as a two-lane undivided highway through the town before turning northeast.

It continues this direction until reaching Meadow, where it turns north again.

[2] When this designation was formed in 1933, the route ran from SR-2, now Interstate 80, in Coalville to the Wyoming border via Pine View.