The Trelawny family had extensive political interest in Cornwall. Trelawny entered Parliament at a by-election on 20 April 1713 as Member of Parliament for West Looe, a family seat, and was returned at the 1713 general election soon after.
The prominent Trelawny family had considerable political power in Cornwall. Trelawny entered politics when he was elected to Parliament by-election on April 20, 1713, as MP for West Looe, a seat held by his family, and won re-election at the general election of 1713.