SS Mariposa was a steam passenger and cargo liner which served in the Pacific Ocean from 1883 to 1917.

Mariposa was an iron ship built in 1883 in Philadelphia by the William Cramp & Sons Shipbuilding Company.

It was of 3,000 gross register tons and was built for the Oceanic Steamship Company, which had been founded in 1881 by John D. Spreckels & Brothers to provide passenger and cargo service between San Francisco and Honolulu, Hawaii.

Mariposa in turn was wrecked on 18 November before making port and everyone had to be rescued after she sank after hitting a Straits Island reef off the coast of British Columbia.

In 1926 the Oceanic Steamship Company was bought out by the Matson Line of which it became a subsidiary.