Plants
Anthurium humboldtianum, a species of arum
Utricularia humboldtii, a large perennial carnivorous plant
Mammillaria humboldtii, a cactus species
Lilium humboldtii, Humboldt's lily
Russula humboldtii, a mushroom species
Quercus humboldtii, a South American oak
Myrmecophila humboldtii, an orchid species
Animals
Vesper bat (Humboldt's big-eared brown bat) (Histiotus humboldti)
Woolly monkey (Humboldt's woolly monkey) (Lagothrix lagotricha)
Squirrel monkey (Humboldt's squirrel monkey) (Saimiri sciureus cassiquiarensis)
Humboldt penguin (Spheniscus humboldti)
Humboldt's hog-nosed skunk (Conepatus humboldtii)
Golden-backed uakari (Cacajao melanocephalus)
Humboldt squid (Dosidicus gigas)
Amazon river dolphin subspecies (Inia geoffrensis humboldtiana)
Mountains
In USA:
Humboldt Mountains (Antarctica), Queen Maud Land
Humboldt Mountains (New Zealand), Otago
Pico Humboldt in Venezuela
Humboldt Peak (Colorado), USA
Humboldts of Nevada:
Humboldt Range
East Humboldts:
West Humboldt Range
East Humboldt Range
Humboldt Peak (Nevada)
Parks, forests, nature preserves
USA:
Parque Nacional Alejandro de Humboldt in Cuba
California:
Nevada:
Buffalo, New York:
Humboldt Park (Chicago park)
Fort Humboldt State Historic Park, in Eureka
Humboldt Bay National Wildlife Refuge
Humboldt Redwoods State Park
Humboldt Wildlife Management Area
Humboldt-Toiyabe National Forest
Humboldt Park, now Martin Luther King, Jr. Park
Humboldt Parkway, repurposed
Water and ice features
Oceanic:
On land:
Humboldt Glacier in Greenland
Pacific Basin:
Bays:
Humboldt Current or Peru Current of the Pacific
Humboldt Bay, California
Humboldt Bay, AKA Yos Sudarso Bay, New Guinea
Humboldt Falls, Fiordland, New Zealand
Humboldt River basin, Nevada, USA:
Humboldt River
Little Humboldt River
Humboldt Salt Marsh
Humboldt Sink
Lake Humboldt
Canada
Humboldt, Saskatchewan
Rural Municipality of Humboldt No. 370, Saskatchewan
Humboldt (electoral district), a former federal electoral district
Humboldt (provincial electoral district), a former Saskatchewan provincial electoral district
United States
Settled places:
Superordinate governmental units:
Humboldt-Toiyabe National Forest, Nevada
Humboldt City, Nevada, ruins of mining settlement
Dewey-Humboldt, Arizona
Humboldt City, California
Humboldt, Illinois
Humboldt, Iowa
Humboldt, Kansas
Humboldt, Nevada
Humboldt, Minnesota
Humboldt, Nebraska
Humboldt, Ohio
Humboldt, Portland, Oregon
Humboldt, South Dakota
Humboldt, Tennessee
In Wisconsin:
Humboldt, Wisconsin, town
Humboldt (community), Wisconsin, unincorporated community
Counties:
Humboldt Township (disambiguation)
Humboldt County, California
Humboldt County, Iowa
Humboldt County, Nevada
Other
Guevea de Humboldt, Oaxaca, Mexico
