Newton Abbot is a market town and civil parish in the Teignbridge District of Devon, England on the River Teign, with a population of 25,556.Newton Abbot holds a historic Cheese and Onion Fayre in honour of Saint Leonard; it was originally held from 5 to 7 November, but is now celebrated at the beginning of September. The town grew very rapidly in the Victorian era as it was home to the South Devon Railway locomotive works.