Kristofer Diedrich Lehmkuhl (born 25 September 1855, died 23 October 1949) was a Norwegian politician from Bergen. He was elected to the Parliament of Norway in 1903 and became the Minister of Labour in 1905 and from 1905-1907. He did not seek reelection in 1906.

He gave name to the three-masted barque rigged sail vessel Statsraad Lehmkuhl.