South East Queensland has a large passenger and freight railway network centred on Brisbane, the capital city of the Australian state of Queensland. Suburban and interurban passenger services in the region are operated by Queensland Rail, which also operates long-distance trains across the state. Aurizon and Pacific National operate freight services.

South East Queensland (SEQ) is a bio-geographical, metropolitan, political and administrative region of the state of Queensland in Australia, with a population of approximately 3.8 million people out of the state's population of 5.1 million. The area covered by South East Queensland varies, depending on the definition of the region, though it tends to include Queensland's three largest cities: the capital city Brisbane; the Gold Coast; and the Sunshine Coast. Its most common use is for political purposes, and covers 35,248 square kilometres (13,609 sq mi) and incorporates 11 local government areas, extending 240 kilometres (150 mi) from Noosa in the north to the Gold Coast and New South Wales border in the south, and 140 kilometres (87 mi) west to Toowoomba. It is the third largest urban area in Australia by population.