Pollachi is a town and a taluk headquarters in Coimbatore district, Tamil Nadu state, India. Located about to the south of Coimbatore, it is the second largest town in the district after Coimbatore. Pollachi is a popular marketplace for jaggery, vegetables and cattle. As of 2011, the town had a population of 90,180.
Pollachi was known as Pozhil Vaitchi in Tamil which means "gifted with beauty" and later became Pollachi. It was also known as during the period of the Cholas.
In 2019, the town became notable for the 2019 Pollachi sexual assault case involving the rape and extortion of numerous women by a gang.
Pollachi is located at . It has an average elevation of . Aliyar river passes about away from the town and the town receives rainfall from Southwest monsoon due to the presence of Palghat gap.
According to the 2011 census, Pollachi had a population of 90,180 with a sex-ratio of 1,012 females for every 1,000 males, much above the national average of 929. A total of 7,732 were under the age of six, constituting 3,952 males and 3,780 females. Scheduled Castes and Scheduled Tribes accounted for 10.57% and 0.29% of the population respectively. The average literacy of the city was 82.15%, compared to the national average of 72.99%. The city had a total of 24,755 households. There were a total of 36,972 workers, comprising 219 cultivators, 488 main agricultural laborers, 1,018 in household industries, 32,720 other workers, 2,527 marginal workers, 25 marginal cultivators, 45 marginal agricultural laborers, 124 marginal workers in household industries and 2,333 other marginal workers.
The economy of the town is predominantly dependent on agriculture. Coconut, jaggery, vegetables and cattle contribute to the agricultural output. There are also coir producing units with raw materials sourced from local farms. Vanilla is also cultivated in certain locations. Pollachi is also a popular movie shooting location for the Tamil film industry owing to its scenic landscape.
Pollachi has schools which follow different curricula such as CBSE, ICSE and state board.