Great Northwest Athletic Conference

2001 - The Great Northwest Athletic Conference (GNAC) was founded. Charter members included the , the University of Alaska at Anchorage, Central Washington University, Humboldt State University (now California State Polytechnic University, Humboldt), Northwest Nazarene University, Saint Martin's, Seattle University, Seattle Pacific University, Western Oregon University and Western Washington University, effective beginning the 2001-02 academic year.

University of Alaska at Fairbanks

2006 - Humboldt State left the GNAC to join the (CCAA), effective after the 2005-06 academic year. This would result in the GNAC dropping football, with Western Washington and Central Washington becoming football affiliates of the now defunct North Central Conference and Western Oregon competing as a D-II independent.

California Collegiate Athletic Association

2007 - joined the GNAC, effective in the 2007-08 academic year.

Montana State University at Billings

2008 - Seattle left the GNAC to join the ranks of the National Collegiate Athletic Association (NCAA) as an NCAA D-I Independent (who would later join the Western Athletic Conference (WAC), effective beginning the 2012-13 academic year), effective after the 2007-08 academic year.

Division I

2008 - joined the GNAC as an affiliate member for football (with Humboldt State returning for that sport), effective with the 2008 fall season (2008-09 academic year), leading to the GNAC to begin sponsoring football once again.

Dixie State University

2010 - joined the GNAC, effective in the 2010-11 academic year.

Simon Fraser University

2012 - Three institutions joined the GNAC as affiliate members: for football, and the University of Mary and the University of Sioux Falls for men's soccer, all effective with the 2012-13 academic year.

Azusa Pacific University

2013 - (South Dakota Mines) joined the GNAC as an affiliate member for men's soccer, effective in the 2013 fall season (2013-14 academic year).

South Dakota School of Mines and Technology

2014 - South Dakota Mines added football to its GNAC affiliate membership, effective in the 2014 fall season (2014-15 academic year).

2015 - South Dakota Mines left the GNAC as an affiliate member for men's soccer, effective after the 2014 fall season (2014-15 academic year).

2015 - joined the GNAC, effective in the 2015-16 academic year.

Concordia University–Portland

2016 - Dixie State and South Dakota Mines left the GNAC as affiliate members for football, effective after the 2015 fall season (2015-16 academic year).

2019 - Humboldt State left the GNAC as an affiliate member for football as the school announced it was dropping the sport after the 2018 fall season (2018-19 academic year).

2019 - The (UC San Diego) and the University of Central Oklahoma (along with Humboldt State returning for that sport), joined the GNAC as affiliate members for women's rowing, effective in the 2020 spring season (2019-20 academic year).

University of California San Diego

2020 - Concordia–Portland left the GNAC as the school announced that it would close, effective after the 2019-20 academic year.

2020 - Azusa Pacific left the GNAC as an affiliate member for football as the school announced it was dropping the sport after the 2020 fall season (2020-21 academic year).

2020 - UC San Diego left the GNAC as an affiliate member for women's rowing, effective after the 2020 spring season (2019-20 academic year), coinciding with the start of its transition to NCAA Division I.

2022 - Central Washington, Western Oregon and Simon Fraser, the only 3 football-sponsoring schools remaining in the GNAC, announce that they will be joining the as football affiliates, bringing an end to the GNAC as a football conference for a second time, effective after the 2021 fall season (2021-22 academic year).

Lone Star Conference

Seattle Pacific is set to launch women's golf starting in 2024

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