State Highway 16 (SH-16 or OK-16) is a state highway in Oklahoma. It runs in an irregular 99.2-mile west-to-east pattern through the northeastern part of the state, running from SH-33 at Drumright to SH-51 at Wagoner. There are no letter-suffixed spur highways branching from SH-16. SH-16 was established in 1936 as a gravel highway running between Bristow at its western end and Beggs at its eastern end. Since then, the highway has been paved and gradually extended to both the east and the west, finally reaching its present-day extent in 1965.