落羽杉（学名：Taxodium distichum）又名落羽松，是柏科落羽杉属的植物，原产于美国。

落羽杉为落叶乔木，高可达30-50米，树干通直，外形似水杉；叶片扁平线形，较水杉略短，互生；小枝互生，果实圆球或卵球形，直径2.5厘米左右；种子为不等三角形，有厚棱角；性喜潮湿，生长在沼泽地者有木质圆柱形膝壮根，拱出地面，在排水通畅之地，生长良好。

Taxodium distichum (bald cypress, baldcypress, bald-cypress, cypress, southern-cypress, white-cypress, tidewater red-cypress, Gulf-cypress, red-cypress, or swamp cypress) is a deciduous conifer in the family Cupressaceae that grows on saturated and seasonally inundated soils in the lowlands of the Southeastern and Gulf Coastal Plains of the United States.