According to FIFA, a crowd of 83,000 is expected at Wembley for the clash after fans snapped up another 5,000 tickets on Wednesday.
The previous record was set in 1996 when 76,489 supporters watched the final between the United States and China in Athens.
A FIFA spokesman said: "We are absolutely delighted with the crowds at the tournament for both men and women - especially the women's matches. It proves what a vital and robust part football plays in the Olympic Games - and always has done."
The final is a re-run of last year's World Cup final – where Japan claimed the victory.