Coordinates: 53°26′07″N 2°44′53″W / 53.4352°N 2.7481°W
Thatto Heath is an area of St Helens, in Merseyside, England. Historically in Lancashire, it lies approximately 6 miles (9.7 km) north-northwest of Widnes and about 12 miles (19 km) east of Liverpool city centre. The area is bordered by Eccleston, Rainhill, Ravenhead, Sutton and Windle.
Thatto Heath is a ward of the Metropolitan Borough of St Helens.
The area is served by Thatto Heath railway station, on the City Line between Liverpool and Wigan.
Thatto Heath is most noted for rugby league; the Thatto Heath Crusaders currently compete in the National Conference League Premier Division.