Dunedin Peninsula and Ocean Beach Railway was a railway line in Dunedin, South Island of New Zealand. The company was incorporated in 1874,^[1] and construction began in December 1875,^[2] and the 3.5 kilometres (2.2 mi) railway opened to Ocean Beach on 23 March 1876.^[3] Extensions were later opened to Anderson's Bay (in 1877),^[1] Forbury, Musselburgh and Tahora Bay.^[3]

Competition from horse trams saw regular passenger services cease in 1882,^[1] with the original company wound up, only for a new company formed that ran race-day trains ran to Forbury Park Raceway until 1904.^[4] The last passenger train was a special troop train in 1914, and goods services ran sporadically until 1938.^[4]

It closed in 1942,^[1] and part of it is now the Ocean Beach Railway, a heritage line.