Robert Rich, 2nd Earl of Warwick (5 June 1587 – 19 April 1658) was an English colonial administrator, admiral, and puritan.
Rich was the eldest son of Robert Rich, 1st Earl of Warwick and his wife Penelope Devereux, Lady Rich, and succeeded to his father's title (Earl of Warwick) in 1619. (A younger brother was Henry Rich, 1st Earl of Holland.) Early developing interest in colonial ventures, he joined the Guinea, New England, and Virginia companies, as well as the Virginia Company's offspring, the Somers Isles Company. Warwick's enterprises involved him in disputes with the British East India Company (1617) and with the Virginia Company, which in 1624 was suppressed as a result of his action. In 1627 he commanded an unsuccessful privateering expedition against the Spaniards.
Warwick's Puritan connections and sympathies gradually estranged him from the court but promoted his association with the New England colonies. In 1628 he indirectly procured the patent for the Massachusetts Bay Colony, and in 1631 he granted the "Saybrook" patent in Connecticut.