John (sometimes "Jack") Claus Voss (born Johannes Claus Voss; 1858–1922) was a German-Canadian sailor best known for sailing around the world in a modified dug-out canoe he named Tilikum ("Friend" in Chinook jargon).

Initially a carpenter, Voss apprenticed on a ship voyaging around Cape Horn and thereafter lived primarily as a sailor.

In 1901, Voss began his most noteworthy voyage with his friend Norman Luxton, ending alone in 1904.

He chronicled this and other notable voyages in The Venturesome Voyages of Captain Voss.

This article about a Canadian writer of non-fiction literature is a stub.