The Somerset and Dorset Joint Railway, also known as the S&D, SDJR or S&DJR, was an English railway line connecting Bath and Bournemouth, with a branch from Evercreech Junction to Burnham-on-Sea and Bridgwater. Strictly speaking, the main line ran from Bath Junction to Broadstone, as the line between Broadstone and Bournemouth was owned by the London and South Western Railway, while the line between Bath Junction and Bath was owned by the Midland Railway.

Burnham-on-Sea is a seaside town in Somerset, England, at the mouth of the River Parrett, upon Bridgwater Bay. Burnham was a small fishing village until the late 18th century when it began to grow because of its popularity as a seaside resort.