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.

The Regions of Queensland refer to the geographic areas of the Australian state of Queensland. Due to its large size and decentralised population, the state is often divided into regions for statistical and administrative purposes. Each region varies somewhat in terms of its economy, population, climate, geography, flora and fauna. Cultural and official perceptions and definitions of the various regions differ somewhat depending on the government agency or popular group by which they are being applied.