Fenwick is a small village and civil parish in the City of Doncaster, South Yorkshire, England, on the border with North Yorkshire. It was part of the West Riding of Yorkshire until 1974. It is located at an elevation of around 6 m above sea level and had a population of 121 at the 2011 Census, a slight increase from 113 at the 2001 Census. The northern boundary of the parish is marked by the River Went.