Thap Thiang Subdistrict (Thai: ทับเที่ยง) is a tambon (sub-district) of Mueang Trang District, Trang Province regarded as the administrative center of the province. Thap Thiang has an area of 14.77 km2 (round about 5.70 mi2) and a population of 59,637 people in 2017.