Smithfield High School is a high school in the Apple Valley section of Smithfield, Rhode Island near Greenville, Rhode Island, USA (in Providence County).

The high school, which opened in 1966, was designed by the architect, Joseph M. Mosher.

High School graduations typically take place at nearby Bryant University.

[3] Smithfield High School's mascot is a Sentinel, and its colors are green and gold.

The high school athletes compete in the Rhode Island Interscholastic League in which most of Rhode Island's public and private schools compete.