Viscount Margesson, of Rugby in the County of Warwick, is a title in the Peerage of the United Kingdom. It was created on 27 April 1942 for the Conservative politician David Margesson. the title is held by his grandson, the third Viscount, who succeeded in 2014.
There is no heir to the viscountcy.
| Escutcheon: | Sable a lion passant guardant Argent a chief engrailed Or thereon between two pallets Azure a pale of the last charged with an ostrich feather erect of the second. |
| Crest: | Upon a coronet composed of four roses set upon a rim Or a lion passant guardant Sable collared Gold and charged with a rose Argent barbed and seeded Proper. |
| Supporters: | On either side a falcon wings elevated Argent armed and belled Or and charged with a portcullis chained Sable. |
| Motto: | Loyaute Me Lie [1] |