Selwyn is a rural town and locality in the Shire of Cloncurry, Queensland, Australia. Selwyn is now an abandoned mining town. In the 2021 census, the locality of Selwyn had a population of 25 people.

Selwyn takes its name from the Selwyn Range, which was named in turn after Alfred Richard Cecil Selwyn, a geologist who was Director of the Geological Survey of Victoria from 1852 to 1869. It was formerly known as Mount Elliott after the prospector James Elliott who discovered copper and gold in the area in 1889.

Mount Elliott Provisional School opened on 1908. On 1 January 1909, it became Mount Elliott State School. In 1910, the school had 70 students and one teacher and an extra teacher was wanted. In early May 1911, there was still only one teacher with 100 students in a building described as "not large enough for half the number" with the suggestion that typhoid outbreaks might be caused by the school's overcrowding. In late May 1911, the Queensland Government announced that an assistant teacher was expected to arrive soon and that plans were being drawn up for a larger school building. A call for tenders to construct the new school building was advertised in March 1912, with a contract for £1,135 awarded in June 1912. In 1912, it was renamed Selwyn State School. In November 1915, the Selwyn Hotel burned down, killing the school's headteacher who was boarding in the hotel. The school closed circa 1936. In December 1937, the school building was relocated to be used as a school building in Boulia.

On 15 December 1910 ,the Selwyn railway line opened to service the Hampden and Mount Elliott mines. It was a branch of the Great Northern Railway and ran south from Cloncurry to Selwyn.

Selwyn's population peaked in 1918 with an estimated population of 1500 people with a hospital and four hotels. However, in 1920, copper prices collapsed and, by 1921, only 191 people were still living in Selwyn.

Mount Cobalt Provisional School opened on 1924 and closed on 1926.

The railway line to Selwyn was closed in 1961.

In the 2016 census, the locality of Selwyn had a population of 50 people.

In the 2021 census, the locality of Selwyn had a population of 25 people.

Selwyn has a number of heritage-listed sites, including:

• Mount Elliott Mining Complex

Although the town of Selwyn is now abandoned, the mining and processing of phosphate occurs in the south-west of the locality at Phosphate Hill (21°52′43″S 139°58′44″E / 21.8787°S 139.979°E / -21.8787; 139.979 (Phosphate Hill)). The facility employs about 250 people with annual capacity of 975,000 tonnes. The mine is serviced by the on-site Phosphate Hill Power Station. The mine is serviced by the Phosphate Hill railway station at the terminus of the Phosphate Hill railway line which branches from the Great Northern Line at the Flynn railway station.

• Mount Elliott mine
• Mount Elliott Company Metallurgical Plant and Mill

• Town plan of Selwyn, 1979