In 1674 he became, by the appointment of the duke of York (later James II.), governor of New York and the Jerseys, though his jurisdiction over the Jerseys was disputed, and until his recall in 1681 to meet an unfounded charge of dishonesty and favouritism in the collection of the revenues, he proved himself to be a capable administrator, whose imperious disposition, however, rendered him somewhat unpopular among the colonists.
For beef, shorthorns, Herefords, Gallo ways and AberdeenAngus cattle are bred largely, whilst for dairying purposes, shorthorns, Ayrshires, Jerseys, Guernseys and Holstein-Friesians prevail.
Andros, previously appointed viceroy of New England, thereupon received a new commission extending his authority over New York and the Jerseys, and in August 1688 he formally annexed these provinces to the Dominion of New England.
For three years there was little or no government in the Jerseys, beyond the measures taken by local officers for preserving the peace.
He was an influential advocate of the surrender of the proprietary government of the Jerseys to the Crown (1702), became a member of the New Jersey Council in 1703, was suspended 'by Governor Cornbury in 1704, was elected a member of the Assembly in 1707 and led that body in opposition to Cornbury, was reappointed to the Council under Governor Lovelace in 1708, was again suspended in 1709 by Lieut.-Governor Ingoldsby, was made President of the Council in 1710 under Governor Hunter, and in 1711, during Hunter's administration (1710-1719), of which he was a staunch supporter, was made a justice of the supreme court of New Jersey.