| Honorific Prefix: | The Right Honourable |
| Richard Best | |
| Office: | Lord Justice of Appeal of the Supreme Court of Northern Ireland |
| Term Start: | 1925 |
| Term End: | 23 February 1939 |
| Office2: | Attorney General for Northern Ireland |
| Term Start2: | 1921 |
| Term End2: | 1925 |
| Constituency Mp3: | Armagh |
| Parliament3: | Northern Ireland |
| Term Start3: | 1921 |
| Term End3: | 1925 |
| Birth Date: | 11 December 1869 |
| Birth Place: | Richhill, County Armagh, Ireland |
Richard Best PC(Ire) KC (11 December 1869 – 23 February 1939) was an Irish barrister, politician and Lord Justice of Appeal.
Best was born in Richhill, County Armagh, son of farmers Robert and Anne Best. He was educated at the Educational Institution, Dundalk (now Dundalk Grammar School) and Trinity College, Dublin where he was Senior Moderator (BA) in mathematics in 1892, and was called to the bar by the King's Inns, Dublin in 1895. He took silk in 1912 and was elected a bencher in 1918. In 1921 he was elected to the House of Commons of Northern Ireland as Unionist member for Armagh and later the same year he was appointed Attorney General for Northern Ireland. He was appointed to the Privy Council of Ireland in the 1922 New Year Honours, entitling him to the style "The Right Honourable".
In 1925 he was appointed a Lord Justice of Appeal of the Supreme Court of Northern Ireland, a position he held until his death.
In 1904, he married Sarah Constance Bevington in St John's Church, Sevenoaks, Kent. They had a son, also called Richard.
| Escutcheon: | Ermine a cinquefoil Gules on a chief of the second a cockatrice between two lions' heads erased Argent langued Azure. |
| Torse: | Of the colours. |
| Crest: | A dexter cubit arm erect vested Gules cuffed Argent charged with an ermine spor Or holding in the hand a sword Proper. |
| Mantling: | Gules doubled Argent. |
| Notes: | Confirmed by Sir Nevile Rodwell Wilkinson, Ulster King of Arms, on 7 September 1935.[1] |
| Motto: | Optimus Est Qui Optime Facit [2] |