Nicholas Grant Billson Cook (born 17 June 1956) is an English cricket umpire and former player who appeared in 15 Tests and three ODIs between 1983 and 1989. A slow left-arm orthodox spin bowler and a lower order right-handed batsman, he played first-class and List A cricket from 1978 to 1994. He is currently an ECB appointed umpire on the professional circuit. He was born in Leicester and attended Lutterworth Grammar School.
| Format | Matches | Runs | Avg | 100s/50s | Top Score | Wickets | Bowl Avg | Best Bowling | Catches/St |
| Test | 15 | 179 | 8.52 | 0/0 | 31 | 52 | 32.48 | 6/65 | 5/– |
| ODI | 3 | – | – | –/– | – | 5 | 19.00 | 2/18 | 2/– |
| FC | 356 | 3,138 | 11.66 | 0/4 | 75 | 879 | 29.01 | 7/34 | 197/– |
| LA | 223 | 491 | 9.26 | 0/0 | 23 | 200 | 34.06 | 4/22 | 74/– |
