Sir James Spearman Winter, KCMG (1 January 1845 – 6 October 1911) was a Newfoundland politician and Premier.

Winter served in the Conservative government of Sir William Whiteway as Solicitor-General from 1882 to 1885 when he resigned along with a number of other Protestants as a result of sectarian riots at Harbour Grace.

Winter was grand master of the Orange Order and intended to launch a new Protestant party but was sidelined when Sir Robert Thorburn formed the Reform Party on a Protestant Rights agenda.

The Winter government faced criticism over the granting of railway contracts and was accused by the Liberal opposition of selling out Newfoundland's interest to the Reid family as the minister of finance in Winter's government was also on Reid's payroll as his legal council while the contract was being negotiated.

As a jurist, Winter represented Newfoundland at the 1887-1888 fisheries conference in Washington and was senior counsel for the British government when Newfoundland was before the arbitration tribunal at the Hague in 1910 over a fisheries dispute.