The Croatian, 54, has been relieved of his duties after just six months in charge of the Hornets.
Watford, who have won just three matches since Christmas, are ninth in the table.
Watford FC confirms the departure of Head Coach Slaven Bilić and his coaching staff.
— Watford Football Club (@WatfordFC) March 7, 2023
Bilic’s departure continues the remarkable churn of managers at Watford under the ownership of the Pozzo family over the past decade. Bilic was the 17th full-time appointment since July 2012.
“We are all ambitious to succeed this season, so something new is needed quickly while the opportunity of promotion is still real,” said Ben Manga, the club’s technical director.
“With the January transfer window over, to change coach is the only option available to re-energise for the final games ahead.”