Woody debris may refer to:

• Slash (logging), coarse and fine woody debris generated during logging operations or through natural forest disturbances
• Coarse woody debris, fallen dead trees and the remains of large branches on the ground in forests
• Large woody debris, logs, branches, and other wood that falls into streams and rivers
  • Log jam, an accumulation of large woody debris that can span an entire stream or river channel

See also

• Dead wood (disambiguation)
• Debris