It is within the Herbert River region which was explored in February 1864 by George Dalrymple and Arthur Scott, with the first settlers arriving in 1869 to take up sugar, cotton and coffee growing.

Buildings in the general vicinity are disparate in form, age and size, although the post office shares a civic precinct with the Hinchinbrook Shire Chambers and Library nearby.

It also fronts a landscaped median strip, running the length of Lannercost Street and incorporates plants, recreational furniture and the town's war memorial clock.

[1] Ingham Post Office is asymmetrical in plan form but comprises twin corner porches which flank a main front gable.

The roof is lined with galvanised corrugated iron, the main ridge parallel to the street, and a central wing projecting forward at right angles.

The post office's dual entry is emphasised by two small enclosures projecting either side of the central breakfront, each containing a slit window.

This section of the building, constructed in reverse hardwood frame has vertical board linings and ceilings and panelled doors, and may correspond to the original 1875 post office.

The entire east wing and verandah appears to be an addition built after 1957 and comprises the open mail sorting room and post office box wall; further south, the construction of the service area and loading dock has internalised the former weatherboard exterior.

[1] Key elements of the building include:[1] The original planning of Ingham Post Office comprised twin porches either side of a central breakfronted postal hall.

Details of the original internal planning arrangement are not known and further obscured by the subsequent removal and/or concealment of fabric, as well as the additions to the building on the south and east sides.

Photographic evidence indicates the east porch was one bay wide and two deep, behind which the transverse gable (located at a lower ridge height that the one currently) included a separate side entry and steps and windows protected by a shingled sunhood.

Changes associated with the enlargement of the Australia Post retail shop including the installation of shelving which conceals the front window wall and suspended acoustic tile ceilings which disrupt the general sense of enclosure.

It is one of many small to medium-sized single-storey post offices designed and built throughout Queensland during the interwar period to service its towns and regional centres; it was also expanded in the 1950s when the area's sugar cane industry underwent an expansionist phase.

These aspects are evident in the original design to the extent it comprised a symmetrically composed twin porch arrangement, with a central breakfront postal hall to Lannercost Street.

[1] Stylistically, the building's pedimented gable front is conservative, particularly by Government architecture standards of the time, but arguably of interest as one of the last generally Colonial-Revival post offices in Australia (albeit altered).

[1] This Wikipedia article was originally based on Ingham Post Office, entry number 106200 in the Australian Heritage Database published by the Commonwealth of Australia 2018 under CC-BY 4.0 licence, accessed on 1 October 2018.