Railways in South East Queensland

Railways in South East Queensland consist of a large passenger and freight rail network centred on Brisbane, the capital city of the Australian state of Queensland. Suburban and interurban passenger rail services are operated by Queensland Rail, which also operates long-distance services connecting Brisbane to the rest of the state. Aurizon and Pacific National are private companies which operate freight services. The passenger rail network in South East Queensland is known as the Citytrain network.

Queensland Rail operates ten suburban and two interurban lines in South East Queensland, all of which are electrified. Centred in the Brisbane central business district, the network extends as far as Gympie in the north, Varsity Lakes in the south, Rosewood in the west, and Cleveland in the east to Moreton Bay.

Each line is ascribed a colour and name on all Queensland Rail signage and marketing collateral including timetables, posters and maps. There are 154 stations on the South East Queensland rail network. Services and ticketing are co-ordinated by the Queensland Government agency Translink.

Queensland Rail’s trains had 42.86 million boardings in the 2022–23 financial year, giving the SEQ rail network the fourth highest patronage out of Australia's suburban rail networks, behind that of Sydney, Melbourne and Perth.