Bjarni Valdimar Tryggvason (September 21, 1945 – April 5, 2022) was an Icelandic-born Canadian engineer and a NRC/CSA astronaut. He was a Payload Specialist on Space Shuttle mission STS-85 in 1997. It was a 12-day mission to study changes in the Earth's atmosphere. Tryggvason was born in Reykjavík, Iceland. He grew up in Vancouver, British Columbia.
Tryggvason died on April 5, 2022 at the age of 76.