Kyle Bjornethun (born March 16, 1995) is an American former professional soccer player who played as a defender.
Bjornethun attended Glacier Peak High School in Snohomish, Washington, where he helped the soccer team to a 3A state title in 2010. On February 6, 2013, he signed a National Letter of Intent to play college soccer at Seattle University.
Bjornethun played four years for the Seattle Redhawks between 2013 and 2016. He was named a second-team All-American in 2015 and was a two-time Western Athletic Conference (WAC) Defensive Player of the Year in 2015 and 2016. Bjornethun was inducted into the school's Athletics Hall of Fame as a member of the class of 2023.
Bjornethun also appeared for USL PDL sides Seattle Sounders FC U-23 and Puget Sound Gunners.
On January 17, 2017, Bjornethun was selected in the fourth round, with the final pick of the draft (88th overall), of the 2017 MLS SuperDraft by Seattle Sounders FC. However, he instead signed for United Soccer League side Portland Timbers 2. Bjornethun made his USL an Portland Timbers 2 debut on March 25, 2017, against Real Monarchs.