England opener Tammy Beaumont has become the leading one-day batter in the world for the first time.
The 29-year-old moved up five places in the International Cricket Council standings
after making 71, 72 not out and 88 not out in the 2-1 series win in New Zealand.
Australia captain Meg Lanning drops to second.
England's Nat Sciver climbed to 10th in the batting rankings and fifth in the all-rounder standings.
She scored 96 runs and took five wickets in the series.
England and New Zealand will play a three-match Twenty20 series in Wellington starting on Wednesday at 02:00 GMT.