| Type | Graduate |
| Start Date | 1940-00-00 |
| Degree | Juris Doctor |
| Notes | He enrolled in Columbia University Law School but left after a year to become an army parachutist. Discharged in 1945 with the rank of major, Colby got his law degree from Columbia, then practiced two years with a New York law firm headed by his former OSS commander, William J. Donovan. |