Narcissa Prentiss Whitman (March 14, 1808 – November 29, 1847) was an American missionary in the Oregon Country of what would become the state of Washington. On their way to found the Protestant Whitman Mission in 1836 with her husband, Marcus, near modern-day Walla Walla, Washington, she and Eliza Hart Spalding (wife of Henry Spalding) became the first documented European-American women to cross the Rocky Mountains.