The Algebuckina Bridge is a Victorian-era railway bridge in the Australian state of South Australia, located about 55 kilometres (34 mi) southeast of the town of Oodnadatta in the locality of Allandale Station on the line of the now-defunct Central Australia Railway. It was opened in January 1892. It was the longest bridge in South Australia until the construction of the Seaford suburban railway line over the Onkaparinga River south of Adelaide in 2014.