| Honorific-Prefix: | Hochwohlgeboren |
| Karl Ritter von Stremayr | |
| Office: | Minister-President of Austria |
| Term Start: | 15 February 1879 |
| Term End: | 12 August 1879 |
| Predecessor: | Adolf Furst von Auersperg |
| Successor: | Eduard Graf von Taaffe |
| Birth Place: | Graz |
| Death Place: | Pottsnach |
Karl Ritter von Stremayr (30 October 1823, Graz - 22 June 1904, Pottschach) was an Austrian statesman. He served as the 9th Minister-President of Cisleithania.
Born in Graz, where he also studied law, he entered the government service, and subsequently was Attorney-General and docent at the University.
In 1848-49 he was a member of the Frankfurt Parliament. In 1868 he was appointed councilor in the Ministry of the Interior, and in 1870-79 was Minister of Public Instruction when he brought about the repeal of the Concordat of 1855.
He was president of the council as the 9th Minister-President of Cisleithania after the going out of the Auersperg ministry in 1879. Afterwards, he entered the cabinet of his successor Eduard Taaffe, 11th Viscount Taaffe, 10th Minister-President of Cisleithania, as Minister of Justice, but resigned in 1880.
He then was appointed vice president of the Austrian Supreme Court before succeeding Anton von Schmerling as president after Schmerling's resignation in 1891.
He retired in 1899. He was called to a seat in the Austrian House of Lords in 1889. Anton Bruckner dedicated to him his Fifth Symphony.