This list embraces topographical watersheds and drainage basins and other topics focused on them.

Terms – different uses

• The source of a river or stream is the furthest place from its estuary or confluence with another river, and is alternatively known as a "watershed" and/or "headwaters" in some countries.
• The confluence is the meeting of two rivers or streams, and may sometimes be known as "headwaters".
• A drainage basin is an area of land where all surface water converges to a single point at a lower elevation. In North America, "watershed" is used for this sense, while elsewhere terms like "catchment" or "drainage area" are used.
• A drainage divide is the line that separates neighboring drainage basins. In English-speaking countries outside of North America, this is normally known as a "watershed".

Drainage divides

• Drainage divides category
• The European Watershed, the line dividing the drainage basins of the major rivers of Europe
• The Drainage divides, the lines dividing drainage basins in North America (i.e.: Great Basin Divide and Great Basin hydrologic region)

Watersheds and drainage basins

• Basins category
• Drainage basins category
• List of drainage basins by area: A worldwide list of watersheds
• Drainage basins of the Atlantic Ocean category
• Drainage basins of the Arctic Ocean category

Watershed and drainage basin organisations and institutions

Other uses

• Watershed College, Zimbabwe
• Watershed Media Centre, Bristol, England
• Stony Brook Millstone Watershed Arboretum
• "River of Words"; watersheds as subject poetry competition