- Damian MiltonCitizenship: United KingdomBorn: August 1973
- Damrong RajanubhabCitizenship: ThailandBorn: June 21, 1862
- Dan McCrumCitizenship: United KingdomBorn: October 1978
- Daniel du ToitCitizenship: South AfricaBorn: 1871
- Daniel MatterCitizenship: FranceBorn: 1957
- Daryl BemCitizenship: United StatesBorn: June 10, 1938
- David ChaumCitizenship: United StatesBorn: May 3, 1955
- David HealyCitizenship: United StatesBorn: December 22, 1936
- David J. AsherCitizenship: United KingdomBorn: 1966
- David J. TholenCitizenship: United StatesBorn: July 31, 1955
- David JablonskiCitizenship: United StatesBorn: June 23, 1953
- David PinesCitizenship: United StatesBorn: June 8, 1924
- David R. De GraffCitizenship: United StatesBorn: 1950
- David SmithCitizenship: United KingdomBorn: 1950
- Denis PapinCitizenship: Kingdom of FranceBorn: August 22, 1647
- Dennis di CiccoCitizenship: United StatesBorn: 1950
- Dick WalkerCitizenship: United StatesBorn: March 9, 1936
- Didier QuelozCitizenship: SwitzerlandBorn: February 23, 1966
- Diego CesarskyCitizenship: ArgentinaBorn: July 26, 1941
- Dieter PuppeCitizenship: GermanyBorn: December 16, 1930
- Domingo Fernández MedranoCitizenship: SpainBorn: May 12, 1901
- Donald Howard MenzelCitizenship: United StatesBorn: April 11, 1901
- Dragutin Gorjanović-KrambergerCitizenship: Austria–HungaryBorn: October 25, 1856
- Duncan HaldaneCitizenship: United KingdomBorn: September 14, 1951
- Dunham JacksonCitizenship: United StatesBorn: July 24, 1888