Humboldt can refer to:

• Alexander von Humboldt, a German natural scientist
• Wilhelm von Humboldt (his brother), a linguist, philosopher, and diplomat

Or any of the many things named for them:

Named for Alexander von Humboldt

Places in California, U.S.

• Humboldt Bay in California
• Humboldt County, California
• Humboldt Hill
• Humboldt Redwoods State Park in California
• Humboldt State University in California

Places in Nevada, U.S.

• Humboldt County, Nevada
• Humboldt, Nevada
• East Humboldt Range in Nevada
• West Humboldt Range in Nevada
• Little Humboldt River in Nevada
• Humboldt Wildlife Management Area in Nevada
• Humboldt-Toiyabe National Forest in Nevada
• Lake Humboldt in Nevada
• Humboldt River in Nevada
• Humboldt Range in Nevada
• Humboldt Salt Marsh in Nevada
• Humboldt Sink in Nevada

Other places in the U.S.

• Humboldt Peak, Colorado
• Humboldt, Illinois
• Humboldt Park , Chicago, Illinois
• Humboldt, Iowa
• Humboldt County, Iowa
• Humboldt, Kansas
• Humboldt Township, in Marquette County, Michigan
• Humboldt, Minnesota
• Humboldt Township, in Clay County, Minnesota
• Humboldt, Nebraska
• Humboldt Municipal Airport (HBO) in Nebraska
• Humboldt, South Dakota
• Humboldt, Tennessee
• Humboldt, Wisconsin

Other places

• Nucleo Pioneiro de Humboldt , scientific center in the Amazon area
• Colégio Humboldt , German school in São Paulo, Brazil
• Humboldt, Saskatchewan, Canada

• Alexander von Humboldt Foundation

Natural formations

• Humboldt Mountain Range in Antarctica
• Humboldt Mountains in China
• Alejandro de Humboldt National Park in Cuba
• Humboldt Glacier in Greenland
• Teluk Humboldt in Indonesia
• Mont Humboldt in New Caledonia
• Humboldt Bay in New Guinea
• Humboldt Mountains in New Zealand
• Mount Humboldt in New Zealand
• Mirador Humboldt in Tenerife
• Pico de Humboldt in Venezuela

• Humboldt Current or Peru Current of the Pacific

Animals

• Humboldt's Big-eared Brown Bat (Histiotus humboldti)
• Humboldt's Woolly Monkey (Lagothrix lagotricha)
• Humboldt's squirrel monkey (Saimiri sciureus cassiquiarensis)
• Humboldt Penguin (Spheniscus humboldti)
• Humboldt's Hog-nosed Skunk (Conepatus humboldtii)
• Humboldt's Black-headed Uakari (Cacajao melanocephalus)
• Yeast species (Pichia humboldtii)
• Humboldt sucker (Catostomus occidentalis humboldtianus)

Plants

• Anthurium (Anthurium humboldtianum Kunth.)
• Bladderwort species (Utricularia humboldtii)
• Cactus species (Mammillaria humboldtii)
• Humboldt's Lily (Lilium humboldtii)
• Mushroom species (Tricholomopsis humboldtii)
• South American Oak (Quercus humboldtii)
• Orchid species (Schomburgkia humboldtii)

In space

• 54 Alexandra, asteroid
• Catena Humboldt on the Moon
• Mare Humboldtianum, lunar crater

Named for Alexander and Wilhelm von Humboldt

• Humboldt University of Berlin (Humboldt-Universität zu Berlin)
• Humboldt Museum of Natural History (Museum für Naturkunde), part of the University

Unknown provenance

• Humboldt State University, Humboldt County, California