Stephen Coffin (1807 – 1882) was an investor, promoter, builder, and militia officer in mid-19th century Portland in the U.S. state of Oregon.

Born in Maine, he moved to Oregon City in 1847, and in 1849 he bought a half-interest in the original Portland townsite.

[1][2] Coffin's interests included the Tualatin Plank Road between Portland and the Tualatin Valley, the Oregon Iron Company, an eastern Oregon sawmill, bridge-building, and other investments and projects.

[3] In 1863, after Coffin provided a steamboat for sending troops up the Columbia River to fight in the Yakima War, Oregon Governor Addison Gibbs made him a brigadier general in the state militia.

[1][4] Coffin donated land to Portland's Methodist Episcopal Church for construction of a boys academy and a girls seminary.