Karl Wilhelm Wefring (11 October 1867 – 28 September 1938) was a Norwegian physician and politician who served as Minister of Defence in the 1920s.

Wefring was first elected to the Parliament of Norway as an independent for South Hedemark for the period 1916–1818.

He served in the parliament for Oslo, representing the Liberal Left Party in the period 19125-1927 where he held the position as president of the Odelsting.

[1] Wefring became attending physician at the national institution with responsibility for the mental ill (Statens sinnssykevesen) in 1919.

This article about a Norwegian politician born in the 1860s is a stub.