Pulis will become only the 25th manager in English football to do so - an achievement that he will reach against former club Stoke City in Matchweek 6 of the 2016/17 Premier League.
"Getting to 1,000 games in management, and for the game to drop at Stoke, its amazing really," Pulis told wba.co.uk. "When I come out of football I'll look back and think of my 1,000 games as an achievement.
"I have been privileged and honoured to have managed a lot of clubs on the way to taking charge of 1,000 games."
Pulis' side beat West Ham United 4-2 last weekend, the first time the Baggies have scored four or more goals in a PL match under the 58-year-old's reign.
Nacer Chadli was involved in all four goals on his home debut and the winger is expected to play at the bet365 Stadium having recovered from a minor knock.