Are There Opossums in California?
Yes, opossums are established throughout much of California. These nocturnal marsupials now inhabit regions from the coastal areas of the San Francisco Bay to San Diego and inland through the Central Valley and lower elevation mountain areas. Opossums were introduced to California in the early twentieth century and have become abundant.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated July 22, 2026.
Virginia Opossum · Public domain CC0
Virginia Opossum · Public domain CC0
Eastern Virginia Opossum · Millie Basden CC BY
- 8,221
- GBIF records
Yes, opossums are in California. Next you'll want:
Yes, opossums are established throughout much of California. These nocturnal marsupials now inhabit regions from the coastal areas of the San Francisco Bay to San Diego and inland through the Central Valley and lower elevation mountain areas. Opossums were introduced to California in the early twentieth century and have become abundant.
Where in California Opossums Are Found
Opossums now occur throughout coastal California and most inland regions. In the San Francisco Bay Area, they are abundant in both urban and wildland settings. Coastal regions from Monterey to Los Angeles support thriving populations. San Diego County hosts dense opossum populations in chaparral scrub, oak woodlands, and residential areas. The Central Valley, once primarily agricultural, now supports opossums in remaining riparian corridors, agricultural edges, and suburban developments. The Sierra Nevada foothills host opossums in mixed oak-conifer forests and chaparral. The Cascade Range supports populations in its lower elevation valleys. Southern California deserts including the Mojave have limited opossum populations restricted to riparian zones like the Kern River and Colorado River areas. Inland mountains including the San Bernardino Mountains and San Gabriel Mountains support opossums at lower and mid elevations. Redwood forests of northern California have limited populations in their warmer edges. Opossum presence decreases significantly in high elevation areas above 5,000 feet and in extremely arid desert regions. The greatest density occurs in coastal and foothill regions where vegetation is lush and moisture is reliable. For information about California opossums and other wildlife, visitCalifornia wildlife resources.
Season and Timing in California
Opossums are active year-round in California with no hibernation. They are most visible during late fall and winter months when mild California weather and abundant winter vegetation create favorable foraging conditions. Breeding begins in late winter, typically January through March, when males become more active and territorial. Litter sizes peak in early spring. Young opossums are born after a brief thirteen-day gestation and develop in the pouch for approximately two months before emerging in late spring or early summer. By midsummer, you may observe females with several young clinging to their backs or following closely behind. Foraging intensity increases in autumn as opossums take advantage of abundant acorns, berries, and insects. California's mild winters mean opossums face minimal cold stress, but occasionally, severe freezes in inland areas can impact populations. Coastal regions maintain relatively stable temperatures year-round, allowing continuous opossum activity. Dry summers in interior California create locally challenging conditions, but opossums persist by concentrating in riparian zones and irrigated landscape areas. Rainfall timing and insect abundance show seasonal patterns that influence opossum activity levels. For more on opossum in California, see ourCalifornia opossum guide.
How to Identify an Opossum
Adult Virginia opossums in California weigh between 8 and 14 pounds, roughly cat-sized. They have distinctively white faces with black noses and dark, beady eyes. The ears are large and hairless. The body is covered in grayish-white fur. The tail is as long as the body, completely hairless, pinkish, and somewhat resembles a rat's tail. Males are larger than females and may show yellowish stains on fur from facial glands. Females have a pouch where young develop. Juvenile opossums match adult coloring and patterns but are smaller. When alarmed, opossums open their mouths in an aggressive hiss. They sometimes bare their teeth and make hissing sounds. The white facial coloring is distinctive and easily separates opossums from California's raccoons, foxes, and coyotes. Unlike skunks, opossums lack bold stripes. Unlike squirrels, opossums are much larger with hairless tails. Opossums have an opposable digit on their hind feet that aids climbing. They are marsupials, the only such animals in California and the entire US north of Mexico. An opossum's white face and size make it unmistakable once observed. You can also browseCalifornia wildlife.
Where Sightings Concentrate in California
Opossums concentrate in areas with adequate vegetation, water, and food. Urban and suburban neighborhoods with mature trees, gardens, and brush provide ideal habitat. Parks and greenbelts in cities from Los Angeles to San Francisco support healthy populations. Riparian corridors along creeks and rivers including the San Joaquin, Sacramento, and Los Angeles rivers host opossums. Oak woodlands in the Sierra foothills attract opossums foraging on acorns. Coastal sage scrub habitat in San Diego and Los Angeles counties supports opossums. The chaparral-woodland transition zone from San Luis Obispo through Santa Barbara offers productive opossum habitat. Residential areas with fruit trees and ornamental plants provide abundant food. Yards with storage structures, sheds, and dense vegetation offer denning sites. Agricultural areas with grain storage and livestock feed attract opossums. Golf courses with irrigation and maintained landscapes support populations. Storm drains, culverts, and bridge structures provide shelter in developed areas. Lakes and reservoirs with wooded shorelines concentrate opossums. VisitCalifornia wildlife informationto explore other animals in these habitats.
Typical Behavior and Diet in California
Opossums are primarily nocturnal and solitary. They spend daylight hours in dens such as tree cavities, brush piles, under buildings, in storm drains, and in other shelter. At dusk, they emerge to forage, traveling nightly routes typically covering less than a mile. They are omnivorous opportunists consuming an extraordinary variety of foods. In California, they eat carrion of all types, insects by the hundreds daily including ticks, small mammals such as mice and voles, bird eggs and nestlings, berries, nuts, acorns, fruit, fungi, and plant material. They are exceptionally clean animals that groom constantly. Opossums are generally silent but produce hisses and growls when threatened. Females are intensely protective of young. Young opossums ride on mothers' backs, learning foraging routes and social behaviors. Opossums establish home ranges that typically remain stable for life. They develop habitual foraging pathways and return repeatedly to productive areas. Despite their seemingly clumsy movements, opossums are capable climbers that forage in trees. Their adaptability to diverse food sources and habitats explains their success throughout California. See all of ourwildlife guides.
Coexistence and Safety
Opossums pose no threat to humans and are extremely docile. They will flee or play dead rather than confront threats. Their famous defense mechanism involves entering a catatonic state when extremely stressed, with their body going rigid, tongue protruding, and foul odor emitted. This behavior makes them vulnerable to predators but provides no risk to humans. California law protects opossums as wildlife but allows property owners to exclude or remove opossums from buildings. If an opossum enters a home, the safest approach is to open doors and allow it to escape voluntarily. Opossums rarely bite and do not carry rabies. They provide significant benefits by consuming enormous quantities of ticks that carry Lyme disease. They also consume rodents and rodent droppings, reducing disease transmission. Removing attractants such as pet food, unsecured garbage, and accessible compost deters opossum visits. Sealing entry points to buildings and culverts after animals depart prevents future entry. For wildlife management guidance, contact local California Department of Fish and Wildlife offices orCalifornia wildlife resources.
Species Confusion
Opossums in California are sometimes confused with several other animals. Raccoons are similar in size but have distinctive black facial masks and ringed tails. Raccoons are far more destructive and aggressive. Gray foxes and kit foxes are lean with pointed faces and bushy tails, quite different from opossums. Coyotes are much larger and rarely venture into gardens. Skunks have bold black and white stripes and emit distinctive odors. Squirrels are smaller with bushy tails and are active during daylight. Ringtail cats occupy rocky areas and have banded tails and pointed faces but are much smaller. Muskrats are aquatic with flat tails. Ground squirrels and pocket mice are diurnal and much smaller. California hosts several opossum species in Central and South America, but only the Virginia opossum occurs in the United States. If an animal plays dead or enters a catatonic state, it is definitely an opossum. The distinctive white face separates opossums from all California wildlife. Confusion typically results from poor lighting or observing only partial animals.
Frequently Asked Questions
Are opossums native to California? No, opossums were introduced to California in the early twentieth century and are now naturalized and fully established. Do opossums threaten native wildlife? Opossums have become part of California's ecosystem and support predators. Their impact on native species is mixed, but they are now integral to the ecosystem. What do opossums eat in California? Opossums consume carrion, insects including ticks, rodents, eggs, berries, acorns, nuts, and plant material. They are valuable for tick control. Are opossums dangerous? No, opossums are completely harmless to humans. They cannot bite effectively and will flee from threats. Can I legally remove opossums from my property? Yes, California law allows humane removal or exclusion of opossums from private property. Can opossums climb? Yes, opossums climb readily using sharp claws and their prehensile tails. They forage in trees and nest in tree cavities. How many young does a female have? Females can have up to fourteen young, though typically eight to ten survive in the pouch to weaning. Young ride mothers' backs for several weeks after leaving the pouch.
Plan your opossum sighting in California
8,221 verified opossum records have been logged in California, most recently in 2026. See the GBIF records.
Where to look in California
- Alcatraz Island · Wildlife Watching, Birdwatching · Find hotels
- Cabrillo National Monument · Wildlife Watching, Birdwatching · Find hotels
- Channel Islands National Park · Wildlife Watching, Birdwatching · Find hotels
- Death Valley National Park · Wildlife Watching, Birdwatching · Find hotels
- Devils Postpile National Monument · Wildlife Watching · Find hotels
- Golden Gate National Recreation Area · Wildlife Watching, Birdwatching · Find hotels
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