Derek John Walker (born 23 November 1959) is a New Zealand cricket umpire and former cricketer. He was a member of the International Panel of Umpires and Referees until June 2016, when he was demoted to New Zealand's national panel.
| Format | Matches | Runs | Avg | 100s/50s | Top Score | Wickets | Bowl Avg | Best Bowling | Catches/St |
| First-class | 40 | 1,562 | 28.92 | 2/8 | 113 | 19 | 36.36 | 4/50 | 25/– |
| List A | 31 | 487 | 18.03– | 0/1 | 63* | 17 | 35.52 | 4/22 | 7/– |
