The 2019–20 Portland State Vikings men's basketball team represented Portland State University in the 2019–20 NCAA Division I men's basketball season.

The Vikings, led by third-year head coach Barret Peery, played their home games at Viking Pavilion in Portland, Oregon as members of the Big Sky Conference.

[1] Due to the ongoing coronavirus pandemic, all postseason tournaments were canceled, including the Big Sky tournament.

[2] The Vikings finished the 2018–19 season 16–16 overall, 11–9 in Big Sky play,[3] to finish in a three-way tie for fourth place.

In the Big Sky Conference tournament, they lost to Weber State in the quarterfinals.