| Kenneth J. Thorneycroft | |
| Birth Date: | 24 March 1928 |
| Birth Place: | Swift Current, Saskatchewan, Canada |
| Death Place: | Ottawa, Ontario, Canada |
| Allegiance: |  Canada |
| Branch: | Canadian Forces Air Command |
| Rank: | Lieutenant-General |
Kenneth John Thorneycroft (March 24, 1928 – May 4, 2018) was a Canadian Forces Air Command officer. He served as deputy commander of NORAD from 1980 to 1983.[1] He died in 2018.[2]