Cameron Corner Survey Marker, Heritage survey marker at intersection of Queensland, New South Wales and South Australia borders.

Cameron Corner Survey Marker is a concrete pillar at the junction of Queensland, New South Wales and South Australia, set in the locality of Cameron Corner, Shire of Bulloo. It defines the westernmost extension of the Queensland–New South Wales border and was established in September 1880 during the first official survey of that western section, undertaken in 1879–1881.

The Cameron Corner Survey Marker was established in September 1880 during the first official survey of the western section of the Queensland–New South Wales border, carried out between 1879 and 1881. It defines the westernmost extension of that border at the 141st meridian of east longitude, the eastern boundary of South Australia. The marker was added to the Queensland Heritage Register on 9 November 2012.

The corner takes its name from surveyor John Brewer Cameron, who led the 1879–1881 survey of the Queensland–New South Wales border. Customs duties between the colonies were introduced in the 1850s, and in 1862 Queensland agreed to the New South Wales Border Customs Act for collecting duties on goods crossing the shared border.

The location sits in an arid region far from major towns, so visitors should bring water, fuel and gear suitable for extreme conditions. Access requires a robust vehicle and planning for extended travel times across remote outback terrain.

The marker defines the westernmost point of the Queensland–New South Wales border, fixed in September 1880 during the first official survey of that western section, carried out between 1879 and 1881. The corner was added to the Queensland Heritage Register on 9 November 2012.