Sandmann declared the victory in a tweet on his 18th birthday. It’s unclear how much the newspaper settled for.
"On 2/19/19, I filed $250M defamation lawsuit against Washington Post. Today, I turned 18 & WaPo settled my lawsuit," he wrote.
"Thanks to @ToddMcMurtry & @LLinWood for their advocacy. Thanks to my family & millions of you who have stood your ground by supporting me. I still have more to do," he continued.
It’s the teen’s second win in a whopping $800 million defamation battle against a number of news outlets including the Washington Post, CNN, ABC, CBS, The Guardian, The Hill and NBC.
CNN agreed to settle with Sandmann in January this year as part of a separate $275 million claim.
Sandmann and a group of his Covington classmates were vilified on social media after they were filmed wearing "Make America Great Again" hats after an anti-abortion rally while being yelled at by demonstrators.
Sandmann, then 16, was singled out after footage of his confrontation with Native American activist Nathan Phillips was picked up by CNN and other outlets who claimed the incident was racially motivated.
Footage released later showed it was the Covington students who were being harassed.
In a subsequent tweet Friday, Sandmann fired a warning shot at Twitter CEO Jack Dorsey.
"We have settled with WAPO and CNN. The fight isn’t over. 2 down. 6 to go. Don’t hold your breath @jack," he wrote.