Williamnagar, formerly known as Simsanggre,[1] is the headquarters of East Garo Hills district in the state of Meghalaya in India.

The legendary Garo leader Pa Togan Nengminja Sangma was felled by the British, in skirmish, at Chisobibra, on the outskirts of Williamnagar, on 12 December 1837.

However, the demand for a separate state of Meghalaya, comprising the Khasi, Jaintia, and Garo Hills, gained momentum in the 1960s.

The Simsang River is an important source of water for irrigation, and the fertile plains along its banks are ideal for agriculture.

[citation needed] The town is surrounded by hills and forests, and the nearby Simsang Wildlife Sanctuary is home to a variety of flora and fauna.