"This afternoon I met with Dwayne and informed him that we would be releasing him," Washington's head coach Ron Rivera said in a statement.
"I told him that I believe it benefits both parties that we go our separate ways. We want to thank Dwayne for his contributions these last two seasons and wish him well moving forward."
Haskins was benched during Washington's loss to the Carolina Panthers on Sunday.
His demotion followed a tumultuous week which saw Haskins lose his role as one of Washington''s captains and was fined an undisclosed amount for violating team Covid-19 protocols.
Washington demoted and fined Haskins after the team was made aware of social media posts showing the 23-year-old without a mask while attending his girlfriend's birthday party.
The NFL's Covid-19 protocol prohibits players from being at indoor dining establishments or bars with more than 10 other people.
Haskins was the team's first round draft pick in 2019 and the15th overall.
The former Ohio State University quarterback apologized to his team last week for his virus protocol actions, saying they were "immature and unacceptable."