Agar Wynne (15 July 1850 – 12 May 1934) was an Australian lawyer and politician. He began his career in the Victorian Legislative Council and served two terms as Solicitor-General of Victoria. In 1906, he transferred to the federal House of Representatives. He was Postmaster-General of Australia in the Cook Government from 1913 to 1914, but retired from federal politics at the 1914 election. He re-entered Victorian politics and briefly served as Attorney-General of Victoria (1917–1918).