Blazon: Or a rose gules surmounted by another argent, both barbed and seeded proper, on a chief sable three stags’ heads caboshed of the third
Crest: Issuant from a mural crown or a dragon wings elevated and addorsed sable holding in the dexter claw a pick of the first and collared argent
Supporters: On the dexter a stag and on the sinister a ram, both proper and gorged with a chain or pendant therefrom a rose gules surmounted by another argent, barbed and seeded also proper
Mantling: Gules lined or
Motto: Bene consulendo (By good counsel)
The double rose is referred to as the Tudor rose; Henry VII adopted it as a badge to symbolize the union of the houses of Lancaster (whose symbol was a red rose) and York (the white rose). The county previously used the Tudor rose as an unofficial device. The stag refers to the first local fort built by Danish invaders, which was named Derby after the number of deer in the region, and eventually gave its name to the county.