Question: What government is the town of Mittagong under?

Context paragraphs:
Mittagong railway station: Mittagong railway station is located on the Main South line in New South Wales, Australia.  It serves the town of Mittagong in the Southern Highlands.

Mittagong Formation: The Mittagong Formation is a sedimentary rock unit in the Sydney Basin in eastern Australia.  , laid down in the Triassic Period.  It may be seen as a interval of interbedded fine-grained sandstone and shale between the Ashfield Shale (above) and the Hawkesbury sandstone (below).  The maximum thickness around Sydney may be ten metres.  Near Town Hall railway station, the formation is 8 metres thick.  In the type area at Mittagong it is 15 metres thick.

Hill Top railway station, New South Wales: Hill Top is a former railway station which was located on the Picton – Mittagong loop railway line.  It served the small town of Hill Top, a Northern Village of the Southern Highlands of New South Wales, Australia.

Welby, New South Wales: Welby is a small town in the Southern Highlands of New South Wales, Australia, in Wingecarribee Shire.  It was originally called Fitzroy.  The town is located 1 km west of Mittagong and houses the local Southern Highlands RTA office.  At the 2016 census , Welby had a population of 758.

Berrima, New South Wales: Berrima ( ) is a historic village in the Southern Highlands of New South Wales, Australia, in Wingecarribee Shire.  The village, once a major town, is located on the Old Hume Highway between Canberra and Sydney.  It was previously known officially as the Town of Berrima.  It is close to the three major towns of the Southern Highlands; Mittagong, Bowral and Moss Vale.

Mittagong Parish: The Parish of Mittagong is a parish of the County of Camden in the Southern Highlands region of New South Wales.  It includes the town of Bowral and the southern parts of Mittagong.

Berrima Parish: The Parish of Berrima is a parish of the County of Camden in the Southern Highlands region of New South Wales.  Berrima is the largest town in the parish, and the parish includes the land to the north and north-east of this town.  The Wingecarribee River forms part of the boundary of the parish in the south, although some of the land near Berrima that is to the south of the river is also included in the parish.  Both the old and new Hume Highway pass through the parish from the south-west to the north-east.  Gibraltar creek is part of the boundary in the north-east.  Bowral and Mittagong are located just to the east of the parish, along with the Southern Highlands railway line.  Mandemar is located in the north-west of the parish.

Mittagong: Mittagong is a town located in the Southern Highlands of New South Wales, Australia, in Wingecarribee Shire.  The town acts as the gateway to the Southern Highlands when coming from Sydney.  Mittagong is situated at an elevation of 635 m .  The town is close to Bowral, Berrima, Moss Vale and the Northern Villages such as Yerrinbool and Colo Vale.  Moreover, Mittagong is home to many wineries of the Southern Highlands which has been a recent growing wine and cellar door region.

Couridjah railway station: Couridjah is a former railway station which was located on the Picton – Mittagong loop railway line.  It served Couridjah, a small town in the Macarthur Region of New South Wales, Australia.

Southern Highlands (New South Wales): The Southern Highlands, also locally referred to as the "Highlands", is a geographical region and district in New South Wales, Australia and is 110 km south-west of Sydney.  The entire region is under the local government area of the Wingecarribee Shire.  The region is also considered a wine region.

Supporting paragraphs: Mittagong railway station Southern Highlands (New South Wales)
Answer: Wingecarribee Shire