The 2020–21 Longwood Lancers men's basketball team represented Longwood University in the 2020–21 NCAA Division I men's basketball season.

The Lancers, led by third-year head coach Griff Aldrich, played their home games at Willett Hall in Farmville, Virginia as members of the Big South Conference.

They defeated UNC Asheville in the quarterfinals of the Big South tournament before losing in the semifinals to Winthrop.

They received an invitation to the CBI where they lost in the quarterfinals to Pepperdine.

They lost in the quarterfinals of the Big South tournament to Hampton.