Piddletrenthide /ˌpɪdəltrɛntˈhaɪd/ is a village and civil parish in the English county of Dorset. It is sited by the small River Piddle in a valley on the dip slope of the Dorset Downs, 8 miles (13 km) north of Dorchester. It lies within the West Dorset administrative district. In the 2011 census the parish—which includes the small village of Plush to the northeast—had 323 dwellings, 290 households and a population of 647.