Ursula Mary Addington, Viscountess Sidmouth (née Hammond; 1760 – 1823) was the wife of Henry Addington, Prime Minister of the United Kingdom between 1801 and 1804 and Speaker of the House of Commons between 1789 and 1801.
She married Addington in 1791, and they had eight children – two sons and four daughters – together, six of whom survived into adulthood. She died in 1823.[1]