The Norfolk and Suffolk Joint Railway (NSJR) was a British joint railway company. The NSJR was owned by the Great Eastern Railway (GER) and the Midland and Great Northern Joint Railway (MGNJ) and consisted of two distinct sections: a line between North Walsham and Cromer via Mundesley, and a coastal section running from Gorleston to Lowestoft. Neither has survived apart from a 1.5 miles (2.4 km) stretch just south of Cromer which forms part of today's Bittern Line.