The corridor was previously a branch of Primary State Highway 14 (PSH 14), established in 1937.

The roadway continues east and passes John Sedgwick Junior High School before turning north into Southworth, Within Southworth, Sedgewick Road ends as SR 160 travels onto a ferry route owned and operated by Washington State Ferries (WSF).

In 2011, WSDOT calculated that between 1,500 and 24,000 vehicles per day used the highway on the Kitsap Peninsula, mostly at the SR 16 interchange in Port Orchard.

[16][17] The branch was included as part of PSH 14 during the creation of the Primary and secondary state highways in 1937.

[2][21] The realignment of SR 160 was set to take effect on April 1, 1992, but was temporarily repealed by the legislature due to a mudslide on February 14 that closed the highway west of Port Orchard.

[22][23] The state government retained ownership of the highway through Port Orchard during cleanup operations, which allowed a partial reopening on April 17 but necessitated later closures for further inspection of unstable slopes.