Skaun is a municipality in Sør-Trøndelag county, Norway. It is part of the Orkdalen region. The administrative centre of the municipality is the village of Børsa. Other villages include Buvika, Eggkleiva, Melby, Skaun, and Viggja.

Skaun is predominantly rural, but is nonetheless situated only 25 kilometres (16 mi) from Norway's third largest city, Trondheim. Most inhabitants, except agricultural and public sector workers, work outside of Skaun in Trondheim, Orkanger, or Melhus. The European route E39 runs east to west across the northern part of the municipality and Norwegian County Road 709 runs north and south through the municipality.

The municipality of Børseskognen was established on 1 January 1890 when it was separated from the municipality of Børsa. The initial population was 1,410. In 1930 the name was changed to Skaun. On 1 January 1965, Skaun, Børsa, and Buvik were merged to form a new, larger municipality of Skaun.

The Old Norse form of the name was (also) Skaun. The name comes from the Old Norse word "skinr", meaning "to shine". This is believed to refer to the lake Laugen.

The coat-of-arms is from modern times; they were adopted on 9 January 1987. The silver and blue colored arms are based on the four large, old standing stones found in the municipality. The four stones are most likely associated with a large grave site dating back to around 500-1000 AD.

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