Shin-Shibaura Station was opened on June 10, 1932 as a station on a spur line of the privately held Tsurumi Rinkō Railway (鶴見臨港鉄道,Tsurumi Rinkō Tetsudō?). The line was extended on the Umi-Shibaura Station on November 1, 1940. The Tsurumi Rinkō line was nationalized on July 1, 1943, and was later absorbed into the Japan National Railway (JNR) network. The station has been unstaffed since March 1, 1971. Upon the privatization of the Japan National Railways (JNR) on April 1, 1987 the station has been operated by JR East.