Westbrook tied the Hall of Fame point guard with 1:39 left in the third quarter for the Indiana Pacers on Saturday night.
Westbrook was on an absolute tear in his first season as a Wizard, recording his 35th triple-double this season. He was 14 in April alone, the most in NBA history.
Westbrook, 32, already has the distinction of having the most triple doubles in a season with 42, in 2016-17.
He got his fourth consecutive triple-double by granting his 10th assist to Bradley Beal near the end of the third quarter at Indianapolis.
The playmaker has a triple-double in 21 of his last 25 outings and has already won an average triple-double in the season for the fourth time in his career.
Robertson has held the all-time triple-double record since 1961-62, the same season Robertson became the only other player to average a triple-double.
The last time an NBA all-time record was broken was when Ray Allen passed Reggie Miller on the all-time list by 3 points in 2011.