State Route 673 (SR 673) is a short, unsigned state highway in Washoe County, Nevada. It runs along a short section of Stead Boulevard providing access to the area of Reno known as Stead.

SR 673 begins at the intersection of North Virginia Street (old US 395) northwest of Reno near Stead. The route heads north along Stead Boulevard, passing underneath U.S. Route 395 freeway and ending just past the interchange. Access to the Reno-Stead Airport is located further north along Stead Boulevard.

The SR 673 designation was originally applied on April 27, 1983.

The entire route is in Reno, Washoe County.