 Upon his own death in 1864, the title passed to his eldest son, Sir Charles Henry Coote, 10th Baronet.While he initially stood unsuccessfully in 1818 and 1820, Coote was first elected Tory MP for Queen's County at a by-election in 1821—caused by the elevation of William Wellesley-Pole to Lord Maryborough—and, becoming a Conservative in 1834, held the seat until 1847, when he did not seek re-election.During this period, he was known as a lax attender, and he generally divided with the Tory leader Lord Liverpool, occasionally siding with the Whigs on matters such as the abolition of joint-postmasterships and inquiries into the borough franchise.