Woburn (wōˈbərn) [key], city (1990 pop. 35,943), Middlesex co., NE Mass.; settled 1640, inc. as a city 1888. Formerly a major center for tanneries, the city has electrical, pharmaceutical, chemical, and leather industries, as well as greenhouses. The scientist Benjamin Thompson (Count Rumford) was born there; his house is now a museum.