Sendamangalam (also spelt as Sendai) is a neighbourhood in the city of Namakkal and Taluk in the Indian state of Tamil Nadu.

Sendamangalam is close to Kolli Hills (கொல்லி மலை), which is part of the Eastern Ghats.

The Senthamangalam taluk is part of Namakkal Lok Sabha constituency.

The nearest major railway stations are in Namakkal and Salem.

Sendamangalam is located 12 kilometres (7.5 mi) northeast from Namakkal on State Highway SH-95.