Udham Singh Dillon
| Date and place of Birth | 21.07.1923 in Hong Kong |
| School | Sir Ellis Kadoorie School, Hong Kong 1932 - 38 |
| College | Queens College 1938 - 08.12.1941 |
| Club | Nav Bharat Club 1954 - 1970 |
| Playing position | Full back |
| First international | 1962 |
| Last international | 1962 |
| FIH Grade 1 umpire | 20.01.1984 |
| Hockey idol | Balbir Singh Sr. (India) |
Udham was in the Matriculation class, Queen's College, when Pearl Harbour was attacked by the Japanese on 8 December 1941 and World War II broke out. That totally ended his furtherance to education.
Udham was the President of Hong Kong Hockey Association from 1984 - 1986.