with different style of awnings and the Queensland side compared to the New South Wales side|left In 1885, the
Queensland Government announced that a town would be formed where the railway line between Queensland and New South Wales would meet. On 29 June 1885, 179 lots were offered for sale at . The town would provide a
break-of-gauge between Queensland's
narrow gauge Southern railway line of and New South Wales's
standard gauge Main North railway line of when the two systems came together in 1888. Two railway stations were created within the area. One was named
Wallan-garra railway station () and the town took its name from the station but used the spelling Wallangarra (with most people using the same spelling for the railway station). Bald Mountain railway station () was the other railway station and is now abandoned. On 28 January 1919, the
Queensland Government placed restrictions on the border crossing at Wallangarra to prevent the spread of the
Spanish flu into Queensland, which were enforced by the
Queensland Police. A medical screening process was used to determine if Queensland residents could safely return to the state. The railway was the only rail link between Queensland and New South Wales until a standard gauge track was completed via
Kyogle in 1930, with the completion of the bridge over the
Clarence River at
Grafton. From that time on, the Wallangarra railway station lessened in importance. Scheduled rail services ended in 1997. In 2003, after major refurbishment, the station was reopened as a museum. The railway line from Stanthorpe to Wallangarra continued to be maintained, and steam tourist trains occasionally operated to Wallangarra until bushfires in late 2023 destroyed wooden bridge links along the route. As of January 2026, the steam trains terminate at Ballandean. The Anderson Meat Packing Company was restarted by
Mr. A.W. Anderson in 1938 after a 15-month closure. Until 1982, it operated a large beef
abattoir at Wallangarra. Anderson's employed in excess of 400 workers at the Wallangarra plant. During
World War II, the
Australian Government created a general army store on the Queensland side of the border, and an
ammunition dump on the New South Wales side.
Dual gauge tracks were run to each store. Wallangarra Cemetery was established in 1953. On 12 September 1964, St Gabrielle's Anglican Church was dedicated by Bishop
John Hudson. Its closure circa 2013 was approved by Bishop
Robert Nolan. The church building was sold into private ownership for $210,000 in October 2014, but remains at 54 Merinda Street (). Taking advantage of the rail junction Riverina Stock Feeds operated a packing plant at Wallangarra railway. Circa 2005,
Thomas Foods International opened Australia's largest mutton works opened on a new site just to the east of the town. The mutton produced is
Halal, and most of it is exported to Arab countries. The abattoir shut down in July 2016 for "the short to medium term" blaming low stock numbers and poor global trading conditions. == Geography ==