Louis Agassiz (1807–1873) was a Swiss-born American biologist and geologist who is recognized as a scholar of Earth's natural history.

Agassiz may also refer to:

• Other members of the Agassiz family, including:
  • Elizabeth Cabot Agassiz (1822–1907), American educator and naturalist, wife of Louis
  • Alexander Agassiz (1835–1910), American scientist and engineer, son of Louis and Elizabeth
  • Rodolphe L. Agassiz (1871–1933), polo champion, son of Alexander
• Graham Agassiz (born 1990), Canadian mountain biker

• Lake Agassiz, a prehistoric glacial lake

• Agassiz Ice Cap, on Ellesmere Island, Nunavut

• Agassiz Glacier (Alaska)
• Agassiz Glacier (Montana)
• Agassiz Peak, in Arizona
• Agassiz Rock, former name of The Monoliths, a park in Massachusetts
• Mount Agassiz (California)
• Mount Agassiz (New Hampshire)
• Mount Agassiz (Utah)

• Agassiz (crater), on Mars
• Agassiz Glacier (New Zealand)
• Agassiz hill, in Argentina and Chile
• Agassizhorn, in Switzerland

• Agassiz, British Columbia, Canada
  • Agassiz station (British Columbia), a railway station
• Agassiz, Cambridge, Massachusetts, U.S.
• Agassiz Township, Lac qui Parle County, Minnesota, U.S.
• Agassiz Wilderness, in Minnesota, US
• Agassiz National Wildlife Refuge in Minnesota, US
• Agassiz (electoral district), in Manitoba, Canada

• Agassiz Brewing Company, a Canadian brewery named for the prehistoric lake
• Agassiz School, a historic building in Ottumwa, Iowa, U.S.
• Agassiz Station, now Oak Ridge Observatory, in Massachusetts, U.S.
• Hotel Agassiz, a historic building in Boston, Massachusetts, U.S.
• HMCS Agassiz, a ship of the Royal Canadian Navy
• USS Agassiz, a ship of the United States Navy
• USCGC Agassiz (WSC-126), a ship of the United States Coast Guard

• All pages with titles beginning with Agassiz
• All pages with titles containing Agassiz
• Agassi, a surname
• Gopherus agassizii, the desert tortoise
• Agassiz's perchlet, a fish
• Anolis agassizi, a lizard
• Agassizia, a genus of sea urchin
• Agassiceras, a Lower Jurassic ammonite

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