Christian Wilhelm Engel Bredal Olssøn (5 April 1844 – 3 November 1915) was a Norwegian military officer and politician.

He was the son of Edvard Olssøn (1820–1867) and Leonore Rebecca Bredal (1820–1910).

He received additional education at the Royal Institute of Technology in Stockholm (1872–1874).

In 1898, he was commander at Oscarsborg, 1899 inspector general for coastal artillery.

He served as Minister of Defence 1893–1894, 1895–1898, 1905–1907, and member of the Council of State Division in Stockholm 1894–1895.