Diana Hay, 23rd Countess of Erroll
| The Countess of Erroll | |
|---|---|
| Lady Erroll in 1946 | |
| Member of the House of Lords Lord Temporal | |
| In office 29 July 1964 – 16 May 1978 Hereditary Peerage | |
| Preceded by | The 22nd Earl of Erroll | 
| Succeeded by | The 24th Earl of Erroll | 
| Personal details | |
| Born | Lady Diana Denyse Hay 5 January 1926 Aberdare Range, Kenya | 
| Died | 16 May 1978 (aged 52) Oban, Argyll, Scotland | 
| Spouses | |
| Children | Merlin, Peregrine, Lady Alexandra, Jocelyn | 
| Parent(s) | Josslyn, Earl of Errol Lady Idina Sackville | 
Diana Denyse Hay, 23rd Countess of Erroll (5 January 1926 – 16 May 1978) was a British noblewoman.