Australian flag consisting of an ochre-red field (background) with a vertical black stripe at the hoist. A white Southern Cross (Crux) constellation is on the stripe, and the field bears a stylized Sturt's desert rose with seven white petals around a black centre.

Local symbols developed somewhat slowly in the Northern Territory. The Sturt's desert rose, which became the territorial floral emblem on July 12, 1961, recalls in its general shape the Commonwealth Star on the Australian national flag. The territorial colours—ochre-red, black, and white—were officially recognized on February 17, 1964, and are said to be associated with the Aboriginal peoples of the area.

A flag consisting of a circular badge of white bearing an orange sun framed by two brown buffalo horns was approved (February 1972) for certain official purposes, but it was not flown by a large segment of the population. When self-government was established on July 1, 1978, the Northern Territory acquired its present flag, and its coat of arms (arms, coat of) was granted on September 11. Each design had been proposed as early as 1969 by the artist Robert Ingpen. The Southern Cross constellation on the black stripe is used on the national flag and on those of several Australian states; however, the flag of the Northern Territory is stylistically distinctive among Australian flags. Its unusual ochre-red background has been reproduced in various shades by flag manufacturers and book publishers.