Humboldt
- 4877 Humboldt
- 54 Alexandra
- Alexander von Humboldt
- Alexander von Humboldt (ship)
- Alexander von Humboldt Foundation
- Alexander von Humboldt German International School Montreal
- Amazon river dolphin
- BIC Humboldt
- Buffalo, New York parks system
- Caracas
- Corner Gas
- Cueva del Guácharo National Park
- Dewey-Humboldt, Arizona
- East Humboldt Range
- El Ávila National Park
- Fort Humboldt State Historic Park
- Golden-backed uakari
- Guevea de Humboldt
- Humboldt (community), Wisconsin
- Humboldt (crater)
- Humboldt (electoral district)
- Humboldt (provincial electoral district)
- Humboldt (steamer)
- Humboldt Airport
- Humboldt Bay
- Humboldt Bay National Wildlife Refuge
- Humboldt Box
- Humboldt Broncos
- Humboldt Broncos bus crash
- Humboldt City, California
- Humboldt City, Nevada
- Humboldt County, California
- Humboldt County, Iowa
- Humboldt County, Nevada
- Humboldt Current
- Humboldt Falls
- Humboldt Glacier
- Humboldt High School (disambiguation)
- Humboldt Mountains (Antarctica)
- Humboldt Mountains (New Zealand)
- Humboldt Municipal Airport (disambiguation)
- Humboldt No. 370, Saskatchewan
- Humboldt Park (Chicago park)
- Humboldt Park, Chicago
- Humboldt Peak (Colorado)
- Humboldt Peak (Nevada)
- Humboldt Prize
- Humboldt Range
- Humboldt Redwoods State Park
- Humboldt River
- Humboldt Salt Marsh
- Humboldt Sink
- Humboldt State University
- Humboldt Street (LIRR station)
- Humboldt Township (disambiguation)
- Humboldt University of Berlin
- Humboldt Wildlife Management Area
- Humboldt penguin
- Humboldt squid
- Humboldt station (Saskatchewan)
- Humboldt's Gift
- Humboldt's hog-nosed skunk
- Humboldt, Illinois
- Humboldt, Iowa
- Humboldt, Kansas
- Humboldt, Minnesota
- Humboldt, Nebraska
- Humboldt, Ohio
- Humboldt, Pennsylvania
- Humboldt, Portland, Oregon
- Humboldt, Queensland
- Humboldt, Saskatchewan
- Humboldt, South Dakota
- Humboldt, Tennessee
- Humboldt, Wisconsin
- Humboldt-Toiyabe National Forest
- Humboldtschule, Bad Homburg
- Humboldt–Hospital station
- Lake Humboldt
- Lilium humboldtii
- Lima, Peru
- List of Anthurium species
- List of Russula species
- Little Humboldt River
- Mammillaria
- Mammillaria humboldtii
- Mare Humboldtianum
- Martin Luther King, Jr. Park
- Mexico City
- Monumento Nacional Alejandro de Humboldt
- Myrmecophila humboldtii
- Natural History Museum, Berlin
- Parque Nacional Alejandro de Humboldt
- Pico Humboldt
- Puebla
- Quercus humboldtii
- Sima Humboldt
- Squirrel monkey
- São Paulo, Brazil
- USCGC Humboldt (WAVP-372)
- USS Humboldt (AVP-21)
- Universidad Alejandro de Humboldt
- Utricularia humboldtii
- Valparaíso
- Vesper bat
- West Humboldt Range
- Wilhelm von Humboldt
- Woolly monkey
- Yos Sudarso Bay