The Countess of Liverpool | |
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| 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 | |
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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.