Promoters of the bill, being led by non-profit Equality Lab, said that a similar bill is being introduced in the State House of Representatives, before it can be sent to the Governor to be signed into a law.
The historic addition marks Harvard as the first Ivy League school to have caste equity protection in its non-discrimination clause for unionised student workers.
A US-based Dalit civil rights organisation on Thursday accused Google of having a casteist and hostile workplace practices.
A bill seeking to explicitly ban caste discrimination has been introduced in the California Senate by a Democratic lawmaker, which, if passed, could make America's most populous state also the country's first to outlaw caste-based bias.
Major Indian businesses and temples issued a joint statement opposing the proposed California Caste Bill SB 403.
Thenmozhi Soundararajan works to break the shackles of caste for Dalits.