Solomon Hirsch (March 25, 1839 – December 15, 1902) was a businessman and politician from the U.S. state of Oregon. He was one of the leaders of Portland's early Jewish community.
With Jacob Mayer and Louis Fleischner, Hirsch was one of the founders of Fleischner, Mayer and Co., the largest wholesale dry goods company on the West Coast.
He served as president of the Oregon State Senate during the 1880 session.
He served as Envoy Extraordinary and Minister Plenipotentiary to the Ottoman Empire from 1889–1892.
Hirsch's wife Josephine was the leader of the Portland Equal Suffrage League. Josephine was the daughter of Solomon's business partner Jacob Mayer. Like his partner Louis Fleischner, Hirsch's brother Edward served as Oregon State Treasurer.
A wing at the Portland Art Museum was dedicated to Solomon and Josephine Hirsch in 1939 after their daughter Ella bequeathed $853,000 ($12.7 million in today's dollars) to the museum.