Forest can refer to:

• A large area covered by trees, or, historically, an area set aside for hunting; see forest and rain forest
• In graph theory, a disjoint union of tree graphs.
• Several places:
  • Forest, Belgium
  • Forest, Fond du Lac County, Wisconsin, United States
  • Forest, North Yorkshire , North Yorkshire, United Kingdom
  • Forest, North Lanarkshire , North Lanarkshire, United Kingdom
  • Forest, Ohio, United States
  • Forest, Pembrokeshire , Pembrokeshire, United Kingdom
  • Forest, Richland County, Wisconsin, United States
  • Forest, St. Croix County, Wisconsin, United States
  • Forest, Vernon County, Wisconsin, United States
  • Forest, Virginia, United States
  • Forest, Frontenac County, Ontario Canada
  • Forest, Lambton County, Ontario Canada
  • Forest, Guernsey

See also: Forest Township, Forest Lake, Forestville, and Lake Forest

• A British smokers' rights organisation: see Forest (smokers' organisation)
• People
  • The actor Forest Whitaker
  • Forrest Gump (note: two "r"s).