The Coates Baronetcy, of Haypark in the City of Belfast, is a title in the Baronetage of the United Kingdom (see also Milnes Coates baronets, which is a separate baronetcy in England and Coats baronets, which is a separate baronetcy in Scotland). It was created on 15 July 1921 for William Coates. He was a senior partner of William F. Coates & Co, stockbrokers, of Belfast, Lord Mayor of Belfast in 1920, 1921, 1922, 1929 and 1930 and a member of the Senate of Northern Ireland. He was succeeded by his son, the second Baronet. He was a brigadier in the Royal Tank Regiment. As of 2014 the title is held by his son, the third Baronet, who succeeded in 1994.
The heir apparent is the present holder's son James Gregory David Coates (born 1977).
| Notes: | Granted 20 June 1923 by Sir Nevile Rodwell Wilkinson, Ulster King of Arms.[1] |
| Escutcheon: | Gules a chevron cotised Argent on a chief Ermine two bells Or on an escutcheon of pretence quarterly 1st & 4th Argent a fir tree growing out of a mount in base Vert surmounted by a sword in bend supporting an Imperial crown in the dexter canton Proper and in chief and base a lion's head erased Azure 2nd & 3rd Gules three bears' heads couped Argent muzzled Sable. |
| Crest: | On a wreath of the colours a cock statant wings closed Gules. |
| Mantling: | Gyles doubled Argent. |
| Motto: | Watchful And Bold |