| Full name: | Delwyn Anne Costello |
| Born: | 14th January 1960, Wellington, New Zealand |
| Died: | 4th August 2018, Christchurch, New Zealand |
| Batting: | Right-hand batter |
| Bowling: | Right-arm medium pace |
| Relations: | Brother: JF Costello |
| Teams: | New Zealand Women (Women's ODI: 1984/85); New Zealand Women (Women's Test: 1984/85); Canterbury Women (Women's First-Class: 1980/81-1986/87); Canterbury Women (Women's List A: 1981/82); All teams |
| Lists of matches and more detailed statistics | |
| Women's Test Career Batting and Fielding (1984/85) | |||||||||||
| M | I | NO | Runs | HS | Ave | 100 | 50 | SRate | Ct | ||
| New Zealand Women | 1 | 1 | 0 | 0 | 0 | 0.00 | 0 | 0 | 0.00 | 0 | |
| Women's Test Career Bowling (1984/85) | ||||||||||
| Balls | Mdns | Runs | Wkts | BB | Ave | 5wI | 10wM | SRate | Econ | |
| New Zealand Women | 240 | 9 | 104 | 2 | 2-77 | 52.00 | 0 | 0 | 120.00 | 2.60 |
| Women's ODI Career Batting and Fielding (1984/85) | ||||||||||
| M | I | NO | Runs | HS | Ave | 100 | 50 | Ct | ||
| New Zealand Women | 7 | 2 | 1 | 1 | 1 | 1.00 | 0 | 0 | 1 | |
| Women's ODI Career Bowling (1984/85) | ||||||||||
| Balls | Mdns | Runs | Wkts | BB | Ave | 4wI | 5wI | SRate | Econ | |
| New Zealand Women | 340 | 8 | 139 | 2 | 2-37 | 69.50 | 0 | 0 | 170.00 | 2.45 |
| Women's First-Class Career Batting and Fielding (1980/81-1986/87) | ||||||||||
| M | I | NO | Runs | HS | Ave | 100 | 50 | Ct | ||
| Overall | 25 | 5 | 3 | 12 | 10* | 6.00 | 0 | 0 | 3 | |
| Women's First-Class Career Bowling (1980/81-1986/87) | ||||||||||
| Balls | Mdns | Runs | Wkts | BB | Ave | 5wI | 10wM | SRate | Econ | |
| Overall | 2299 | 150 | 873 | 50 | 5-33 | 17.46 | 2 | 0 | 85.14 | 1.75 |
| Women's List A Career Batting and Fielding (1981/82-1984/85) | ||||||||||
| M | I | NO | Runs | HS | Ave | 100 | 50 | Ct | ||
| Overall | 14 | 4 | 3 | 17 | 9* | 17.00 | 0 | 0 | 3 | |
| Women's List A Career Bowling (1981/82-1984/85) | ||||||||||
| Balls | Mdns | Runs | Wkts | BB | Ave | 4wI | 5wI | SRate | Econ | |
| Overall | 722 | 25 | 302 | 11 | 4-4 | 27.45 | 1 | 0 | 65.63 | 2.50 |