Integral Coach Factory (ICF) is a manufacturer of rail coaches located in Perambur, Chennai, Tamil Nadu, India. It was established in 1955, and is owned and operated by the Indian Railways. It is located in Perambur, in the suburbs of Chennai. The ICF is one of the three rake production units of the Indian Railways, the other two being the Modern Coach Factory at Raebareli and the Rail Coach Factory at Kapurthala.

The coach factory primarily manufactures rolling stock for Indian Railways but also exports railway coaches to other countries. ICF set a new record producing 2,503 coaches in the fiscal year 2017–2018. It became the world's largest railway coach manufacturer, rolling out 3,262 coaches in the fiscal year 2018–2019, up from 1,437 coaches in 2009–2010, expecting to produce 4,000 units in the fiscal year 2019–2020.