UK Parliamentarians
- Lord DowdingCrossbenchMember of the House of LordsPeer since 1992
- Viscount DowneConservativeMember of the House of LordsPeer since 1965
- Graeme DownieLabourMP for Dunfermline and DollarMP since 2024
- Marquess of DownshireConservativeMember of the House of LordsPeer since 1989
- The Marquess of DownshireOtherMember of the House of LordsPeer since 1918
- Gemma DoyleLabourMP for West DunbartonshireMP since 2010
- Lord DoyleNon-affiliatedMember of the House of LordsPeer since 2026
- Dame Jackie Doyle-PriceConservativeMP for ThurrockMP since 2010
- Baroness DrakeLabourMember of the House of LordsPeer since 2010
- Richard DraxConservativeMP for South DorsetMP since 2010
- Lord DraysonLabourMember of the House of LordsPeer since 2004
- Dr David DrewLabourMP for StroudMP since 2017
- Earl of DroghedaCrossbenchMember of the House of LordsPeer since 1989
- Earl of DroghedaConservativeMember of the House of LordsPeer since 1957
- Jack DromeyLabourMP for Birmingham, ErdingtonMP since 2010
- Julia DrownLabourMP for South SwindonMP since 1997
- Lord DrumalbynConservativeMember of the House of LordsPeer since 1963
- Mrs Flick DrummondConservativeMP for Meon ValleyMP since 2019
- Lord DubsLabourMember of the House of LordsPeer since 1994
- Earl of DucieNon-affiliatedMember of the House of LordsPeer since 1991
- Earl of DucieOtherMember of the House of LordsPeer since 1952
- Sir James DuddridgeConservativeMP for Rochford and Southend EastMP since 2005
- Baroness DudleyOtherMember of the House of LordsPeer since 1972
- Earl of DudleyConservativeMember of the House of LordsPeer since 1969
- The Marquess of Dufferin and AvaConservativeMember of the House of LordsPeer since 1945
- Rosie DuffieldIndependentMP for CanterburyMP since 2017
- Sir Patrick DuffyLabourMP for Sheffield, AttercliffeMP since 1970
- Michael DugherLabourMP for Barnsley EastMP since 2010
- David DuguidConservativeMP for Banff and BuchanMP since 2017
- Lord DulvertonConservativeMember of the House of LordsPeer since 1956
- Lord DulvertonCrossbenchMember of the House of LordsPeer since 1992
- Sir Iain Duncan SmithConservativeMP for Chingford and Woodford GreenMP since 1992
Source: parliament.uk · 1,424 currently sitting · Open Government Licence v3.0