State Highway 275 or SH 275 is a Texas state highway running along the northern side of Galveston Island from Interstate 45 to SH 87.

SH 275 was originally designated in 1939 on a route from Mabelle to Jimtown. This was cancelled in 1943. The current route was designated in 1993.

SH 275 begins at a junction with I-45 in Galveston. It initially heads north, but turns towards the east as it heads through Galveston. SH 275 reaches its eastern terminus at a junction with SH 87 in Galveston. The highway is also known as Harborside Drive.