Walnut Hill is a populated place LOCATED WITHIN the City of Woburn. In turn, the City of Woburn is located within Middlesex County.
Walnut Hill is located at latitude 42.496 and longitude -71.129.
Since Walnut Hill is located within the City of Woburn, all of the census and demographic data for residents of Walnut Hill are included as part of the information reported for City of Woburn in the "Profile" tab above.