Woolloongaba Post Office is a heritage-listed former post office at 765 Stanley Street, Woolloongabba, City of Brisbane, Queensland, Australia. It was designed by Thomas Pye and built in 1905 by Thomas Rees. It is also known as Woolloongabba Post & Telegraph Office. It was added to the Queensland Heritage Register on 24 January 2003.

The Woolloongabba Post & Telegraph Office was constructed in 1905 for the Commonwealth Department of Home Affairs, to a plan designed and supervised by the Queensland Government Architect in the Queensland Department of Public Works.

It replaced an earlier Woolloongabba Post & Telegraph Office, opened in rented premises in Logan Road, in 1887. The population of Woolloongabba, which had grown steadily between the 1860s and 1880s, increased rapidly following the expansion of the railway line to Woolloongabba in 1884, and the extension of the electric tramway to Woolloongabba/East Brisbane in 1897. During the 1880s and 1890s the 'Gabba developed as Brisbane's fourth major shopping centre, the others being Brisbane CBD, Fortitude Valley and Stanley Street at South Brisbane. By the turn of the century, most of the allotments facing Stanley Street, Logan Road and Ipswich Road at the Woolloongabba Fiveways were fully developed commercial sites.

Following the separation of Queensland from New South Wales in 1859 and prior to Federation of Australia in 1901, the Queensland Government organised the postal service for the state. In 1901 the newly established Commonwealth Government became responsible for communications, and the Commonwealth Postmaster-General's Department was created. The transfer of responsibilities from the States to the Commonwealth was gradual, and the Queensland Department of Works continued to carry out design and documentation of post offices on behalf of the Commonwealth Government until c. 1920.

Alfred Barton Brady was employed with the Queensland Government as Government Architect from 1892 to 1922. Brady claimed that he always advised on arrangement, style and materials, but it appears that his Senior Assistant, Thomas Pye supervised much of the detailed design. During the 30 years they worked together in the department, Brady and Pye assembled a talented group of architects and draftsmen who were considered the equal of any in Australia, including from 1893 to 1903 John Smith Murdoch, who was to become Commonwealth Director-General of Works in 1927. Pye later served as deputy government architect from 1906 to 1921, and a major example of his work is the former Executive Building (now known as the Land Administration Building) in William Street. From the office of the Government Architect there developed a tradition of fine government buildings, including many post offices, customs houses and court houses throughout the State.

A new post office building was proposed as early as 1901, and approval was given in August 1902 to purchase the present site for £1,250. The site was previously owned by the Wesleyan Methodist Church, and provided the Commonwealth with the opportunity to acquire a site for the post office that was on one of the three major streets which formed the Fiveways and was within close proximity of the centre of local activity, the Wooloongabba Branch railway line and the tramway.

In October 1903 the Commonwealth requested the Queensland Department of Public Works to prepare sketch plans for the building and to survey the site.

Working plans for the building were completed in 1904, under Pye's supervision.