Trembath is a surname of Cornish origin. Notable people with the name include:
Bill Brunier (full name William Davies Trembath Brunier), Australian VFL footballer Christopher Trembath, English cricketer Cooper Trembath, Australian AFL footballer Ethan Trembath, New Zealand bass guitarist (Alien Weaponry) James Trembath, South African sports shooter Luke Trembath, Australian professional snowboarder Richard C. Trembath, American politician Thomas Trembath, Australian cricketer Elizabeth Trembath-Reichert, American space biologist