Sathyamangalam (also known as Sathy) is a town and municipality in Erode district in the Indian state of Tamil Nadu.

It lies on the banks of the Bhavani river, a tributary of the Cauvery in the foothills of the Western Ghats and is the headquarters of Sathyamangalam taluk.

[8] Sathyamangalam is situated on the southern side of the Western Ghats, which extend towards the east from the Nilgiri mountains.

It is contiguous with the Biligirirangan Temple Wildlife Sanctuary to the north in neighboring Chamarajanagar district of Karnataka, and together forms a vital corridor for elephant movements.

The 2009 wildlife survey conducted by Government of Tamil Nadu enumerated 12 Bengal tiger, 836 Indian elephants, 779 blackbucks, and 20 leopards.

[4] Sathyamanagalam assembly constituency was merged with Bhavani Sagar as a part of delimitation by the Election Commission of India.

[17] The town is situated at a distance of 65 km from district headquarters Erode, connected through State Highway 15 via Gobichettipalayam.

A proposal to construct a railway line connecting Mysore with Erode via Sathyamangalam was mooted during the British rule in 1915.

Four official surveys were made in 1922, 1936, 1942 and as recently as 2008, but the plan failed to take off due to the concerns of railway line passing through the Sathyamangalam Wildlife Sanctuary.