Avinashi (previously known as Thirupukkoliyur) is a municipality in Tirupur district in the Indian state of Tamil Nadu. It is one of the fastest growing western suburbs of Coimbatore. Avinashi is one of seven taluks namely Udumalaipettai, Kangeyam, Dharapuram, Palladam, Madathukulam, Tiruppur, Avinashi tuluk of Tirupur district. Avinashi is on National Highway NH47, which now bypasses the town. It is a town with rich cultural heritage and also keeping up with the fast developments of the adjacent city.
In local administration, the Avinashi town is a municipality while in the state administrative structure Avinashi is a Taluk in the district of Tirupur. The Corporation of Coimbatore has drafted a Master Plan that aims to develop Avinashi as a satellite town around the Coimbatore city.