Mary Jenkinson, Countess of Liverpool
| The Countess of Liverpool | |
|---|---|
| Born | Mary Chester 24 June 1777 | 
| Died | 18 October 1846 (aged 69) Kingston upon Thames, England | 
| Nationality | British | 
| Known for | Spouse of the prime minister of the United Kingdom (1822–1827) | 
| Spouse | |
| Parents | 
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Mary Jenkinson, Countess of Liverpool (née Chester; 24 June 1777 – 18 October 1846) was the second wife of Robert Jenkinson, 2nd Earl of Liverpool who served as Prime Minister from 1812 to 1827.