Weddell may refer to:

• Alan Weddell (born 1950), American college football coach
• Alexander W. Weddell (1876–1948), American diplomat; ambassador to Argentina and Spain
• Hugh Algernon Weddell (1819–1877), English botanist
• James Weddell (1787–1834), English navigator and Antarctic explorer
• Robert Weddell (1882–1951), Australian soldier and government administrator

• Weddell Glacier on South Georgia Island in the South Atlantic Ocean
• Weddell Island, one of the Falkland Islands in the South Atlantic Ocean
• Weddell Islands, in the South Orkney Islands
• Weddell Point, on South Georgia Island
• Weddell Point, Weddell Island in the Falkland Islands
• Weddell Settlement, on Weddell Island in the Falkland Islands

• Weddell Sea, near Antarctica south of the Atlantic Ocean
• Weddell Gyre, an ocean current in the Weddell Sea
• Weddell Plain, an undersea abyssal plain
• Weddell Polynya, an area of water surrounded by sea ice in the Weddell Sea

• Weddell, Northern Territory, a locality in Australia

• Weddell seal, Antarctic seal, most southerly distribution of any mammal
• Weddle, another surname
• Wedel (disambiguation)