Wembworthy is a small village, parish and former manor in Mid-Devon, England. It is situated in the valley of the River Taw, 8 miles north-east of the towns of Hatherleigh and 12 miles south of South Molton. St Michael's Church is the parish church, much rebuilt in the 1840s. The vestigial remnants of two mediaeval earthwork castles survive within the parish, one in Heywood Wood, of motte and bailey form, the other to its south of ringwork and bailey form.