Workers of Buckingham and Carnatic Mills in the city of Chennai, India, begin a four-month strike.

The 1921 Buckingham and Carnatic Mills strike was a strike by the workers of Buckingham and Carnatic Mills in the city of Madras (now called Chennai), India, against the managing company, Binny and Co. The strike, which lasted from June to October 1921, caused severe losses to the Madras economy. It also created a rift in the ruling Justice Party forcing many Dalit leaders to leave.

Buckingham and Carnatic Mills, popularly known as B & C Mills, were textile mills run by Binny and Co. in the city of Chennai, India. The mills were closed down in 1996 and the site is now used as a container freight station and is a popular venue for film shootings.