National Highway A2, Queensland

A2 Barkly Highway Landsborough Highway Warrego Highway
Formerly
Length	1,976 km (1,228 mi)
Direction	North West - South East
From	Barkly Highway Northern Territory
Major settlements	Mount Isa, Cloncurry, Longreach, Barcaldine, Roma, Dalby, Toowoomba
To	Ipswich Motorway Ipswich, Queensland
Allocation	National Highway A2
Major junctions	Flinders Hwy Capricorn Hwy Mitchell Hwy Warrego Hwy Carnarvon Hwy Leichhardt Hwy Moonie Hwy Bunya Hwy Gore Hwy New England Hwy Brisbane Valley Hwy

National Highway A2 is a major highway route in Queensland, Australia. The route consists of three highways, the Barkly Highway, Landsborough Highway and Warrego Highway. The route was resigned from National Highways 66, 71 and 54 respectively to National Highway A2 in the early 2000s. It was the first regional route in Queensland to have alphanumeric numbering, and the second across the state, after the Pacific Motorway, M1.

The route is part of the Australian National Highways scheme, despite route markers not displaying this. It is the quickest and most direct route between Brisbane and Darwin. The highway is currently part of the Auslink scheme.