The following is a list of landforms and other geographical features located within the political boundaries of Sussex County in northwestern New Jersey in the United States.

• Kittatinny Mountain
  • Culver Ridge
  • High Point (New Jersey)
  • Bird Mountain (New Jersey)
  • Blue Mountain (New Jersey)
  • Rattlesnake Mountain (New Jersey)
  • Sunrise Mountain (New Jersey)
  • Paradise Mountain (New Jersey)
• Wallpack Ridge

• Allamuchy Mountain
• Cage Hill
• Hamburg Mountains (New Jersey)
• Wawayanda Mountain
• Lookout Mountain (New Jersey)
• Maple Hill (New Jersey)
• Pimple Hills
• Pochuck Mountain
• Rutan Hill
• Smiths Hill
• Sparta Mountains
• Sterling Hill (New Jersey)

• Kittatinny Valley
• Wallkill Valley
• Wallpack Valley

• Wallkill River
  • Papakating Creek
    • West Branch Papakating Creek
    • Neepaulakating Creek
    • Clove Brook
• Pequannock River
• Pequest River
• Pochuck Creek
  • Black Creek (New Jersey)
  • Wawayanda Creek
• Delaware River
  • Flat Brook
    • Tillmans Brook
    • Big Flat Brook
    • Little Flat Brook
  • Paulins Kill
    • Dry Brook
    • Culver Brook (West Branch Paulins Kill)
    • Nelden Brook
  • Musconetcong River
    • Lubbers Run
    • Punkhorn Creek

• Brau Kettle
• Culver's Lake
• Lake Hopatcong
• Lake Lackawanna
• Lake Mohawk
• Lake Musconetcong
• Lake Owassa
• Muckshaw Ponds

• Sussex County Snow Belt

• Delaware Water Gap National Recreation Area
• High Point State Park
• Stokes State Forest
• Swartswood State Park
• Kittatinny Valley State Park
• Wawayanda State Park
• Wallkill River National Wildlife Refuge

• County of Sussex (government website)