Raccoons sleep in sheltered spots during the day, most often inside tree cavities, but they are remarkably flexible about what counts as shelter. A study tracking daytime resting sites in southern Illinois found that about three-quarters of all sites were tree cavities, with the remaining quarter being more exposed locations like ground-level brush or open tree limbs. That preference for enclosed, elevated hollows holds as a general pattern, but raccoons will swap to attics, storm drains, rock crevices, abandoned burrows, and even dense ground vegetation depending on what the landscape offers, what season it is, and whether they are raising young.
Tree Cavities Are the Default
When raccoons have access to mature hardwood forest, tree hollows are overwhelmingly their first choice. The southern Illinois research, which radio-tracked raccoons and classified each daytime resting site by type, put tree cavities at 73% of all recorded sites.1The American Midland Naturalist. Habitat Characteristics of Raccoon Daytime Resting Sites in Southern Illinois That makes sense when you think about what a raccoon needs during the day: protection from weather, concealment from predators like coyotes and great horned owls, and thermal insulation. A deep cavity in a large oak or sycamore checks all three boxes. The opening is usually just wide enough for the raccoon to squeeze through, which limits what can follow it inside.
Raccoons do not build nests the way squirrels do. They find an existing hollow, settle in, and leave. There is no construction, no lining, no elaborate preparation. A raccoon might use the same tree cavity repeatedly for weeks, then abandon it without apparent reason and switch to a different one. This is one of the defining features of raccoon denning behavior: they maintain a mental map of multiple usable sites and rotate among them. A single raccoon’s home range typically contains several viable dens, and it might use a different one on consecutive nights depending on where its foraging takes it.
Males and Females Choose Differently
Den preference is not uniform across raccoons. A multi-year study in Mississippi that tracked 48 raccoons found that den types varied by both sex and season. Females leaned heavily toward cavity dens during the period when they were rearing young, while males were more likely to use ground-level dens and brush piles.2BioOne Complete (Journal of Wildlife Management). A Multi-Resolution Assessment of Raccoon Den Selection
The reason behind this split is straightforward. A nursing mother with a litter of kits needs maximum security. Tree cavities are hard for predators to access, they buffer temperature swings, and they keep the kits contained in one place while she leaves to forage. Males, with no parental duties, can afford to be less choosy. A brush pile or a tangle of fallen logs is good enough for a daytime nap when you do not have vulnerable offspring to protect. Outside of the breeding season, the gap narrows and both sexes use a wider variety of sites.
The same Mississippi study also found that female raccoons selected den sites near crop fields, while males gravitated toward sites near lakes and ponds. This likely reflects differences in foraging strategy: females with young need calorie-dense food close to the den, while males range more widely and favor aquatic food sources like crayfish and frogs.2BioOne Complete (Journal of Wildlife Management). A Multi-Resolution Assessment of Raccoon Den Selection
Urban and Suburban Raccoons Sleep in Your Infrastructure
In cities and suburbs, the picture changes dramatically. Tree cavities become scarce, and man-made structures fill the gap. Attics, crawlspaces, chimneys, sheds, garages, storm sewers, and the spaces beneath decks and porches all serve as raccoon dens. Urban raccoons are not reluctantly squeezing into buildings because they have no other option. In many cases, these structures are actually better than natural cavities: warmer in winter, more spacious, and often closer to reliable food sources like garbage cans and pet food bowls.
Research on lactating female raccoons in suburban areas found that half of all den and resting sites were in man-made structures. Even after raccoons were physically removed from homes and excluded from re-entering, the majority relocated to other man-made structures rather than shifting to natural sites. Of 24 radio-collared animals in the study, 15 returned to another man-made structure at least once, while only 4 used exclusively natural areas.3Wildlife Society Bulletin. Den Site Selection of Lactating Female Raccoons Following Removal and Exclusion from Suburban Residences Perhaps most telling, 80% of raccoons tracked into the following year returned to houses.3Wildlife Society Bulletin. Den Site Selection of Lactating Female Raccoons Following Removal and Exclusion from Suburban Residences
This has real implications if you are dealing with raccoons in your attic. Removing one animal and sealing the entry point is not necessarily the end of the problem. Other raccoons in the area are likely aware of the same structure, and the evicted animal itself will actively look for another building to den in. The preference for man-made structures is not incidental; it is a deeply ingrained behavior in suburban raccoon populations.
How Urban Density Changes Everything
Urban raccoon populations can be staggeringly dense compared to their rural counterparts. A study of raccoons in Rock Creek Park, a national park embedded in Washington, D.C., found densities as high as roughly 333 raccoons per square kilometer in some sections, with a parkwide average of about 125 per square kilometer.4WellBeing International Studies Repository. Population density, survival, and rabies in raccoons in an urban national park That is many times higher than densities recorded in rural or forested habitats. When that many raccoons share a small area, the competition for den sites intensifies, and raccoons become even more creative about where they sleep.
High density also means that disease becomes the primary population control rather than predation or hunting. The Rock Creek study noted that urban raccoon survival rates were generally high except when rabies swept through the population, causing sharp juvenile mortality.4WellBeing International Studies Repository. Population density, survival, and rabies in raccoons in an urban national park In rural areas, hunting and trapping are the main mortality factors. In cities, epizootics of rabies and canine distemper periodically thin the ranks. This matters for denning behavior because high-density populations put more pressure on every available shelter, from hollow trees to abandoned buildings to storm sewers. A tree cavity that might be used by one raccoon in a rural forest could see multiple animals cycling through it in a city park.
Where Den Sites Sit in the Landscape
Raccoons do not pick dens at random across their home range. Research consistently finds that den sites cluster near certain landscape features. The Mississippi study showed that dens were located closer to crop fields, roads, and habitat edges than would be expected by chance. At a broader landscape level, dens were associated with larger patches of woody cover, more edge habitat between different land types, and proximity to lakes and ponds.2BioOne Complete (Journal of Wildlife Management). A Multi-Resolution Assessment of Raccoon Den Selection
Edge habitat is key. Raccoons thrive where different environments meet: forest meets field, suburb meets creek, park meets residential neighborhood. These boundaries give them access to diverse food sources within short travel distances, which means they can forage efficiently and return to a nearby den before dawn. A raccoon sleeping in a hollow tree at the edge of a cornfield is ideally positioned: the tree provides shelter, the field provides food, and the proximity means minimal travel and minimal exposure to predators.
This edge preference also explains why raccoons do so well in fragmented landscapes. Suburban sprawl, with its patchwork of small woodlots, backyards, and drainage corridors, creates an enormous amount of edge habitat. From a raccoon’s perspective, a subdivision is not a loss of forest. It is a bonanza of edges, each one a potential foraging route with dens scattered along it.
The Daily Rhythm
Raccoons are primarily nocturnal, emerging around dusk and returning to a den site around dawn. Their nightly activity pattern typically involves leaving the den at or shortly after sunset, foraging across their home range for most of the night, and returning to a resting site in the early morning hours. During the night, they might cover a considerable distance, though they tend to stay within a familiar home range rather than striking out into unknown territory.
There is an important qualifier to the “strictly nocturnal” label, though. Raccoons are better described as crepuscular-to-nocturnal, meaning they are most active during twilight and the dark hours but are perfectly capable of daytime activity. Nursing females frequently forage during the day because the caloric demands of lactation make a single night of foraging insufficient. Raccoons in areas with minimal human disturbance may also be active during daylight. Seeing a raccoon out during the day does not automatically mean it is sick, despite the common assumption that a daytime raccoon must be rabid. Disorientation, staggering, and aggression are the actual warning signs of rabies, not simply being awake at an unusual hour.
Seasonal shifts also affect the daily pattern. In northern climates during winter, raccoons become far less active. They do not truly hibernate, but they enter extended periods of torpor, staying in their dens for days or weeks at a time, living off stored body fat. During these cold stretches, raccoons may den communally: several animals sharing a single large cavity or attic space, which conserves body heat. A hollow tree that houses one raccoon in July might hold three or four during a January cold snap.
Social Sleeping Arrangements
Raccoons are more social than their reputation as solitary scavengers suggests, and this sociality extends to their denning behavior. Research tracking male raccoons at the northern edge of their range found that roughly 80% of adult males formed coalition groups. These coalitions had extensively overlapping home ranges, with overlap between group members reaching as high as 85 to 97%, while overlap between different coalition groups was essentially zero.5Journal of Mammalogy. Social organization and group formation of raccoons at the edge of their distribution
Males in the same coalition often share dens, particularly during winter torpor periods. These are not random aggregations of strangers huddling for warmth; they are socially bonded groups that maintain coordinated movements and territorial boundaries year-round. Female raccoons, by contrast, tend to den alone or with their current litter, though related females sometimes occupy overlapping territories and may share den sites after kits are weaned.
The practical upshot: if you find raccoons denning in your attic or crawlspace, there may be more than one adult involved, especially outside the breeding season. A homeowner who successfully excludes what they think is a single raccoon might discover that a second or third animal from the same social group was also using the space and is now looking for a new way in.
Raccoons Sleeping in Non-Native Environments
Raccoons are native to North America, but feral populations now live in parts of Europe and Asia, and their denning behavior in these new environments shows just how adaptable they are. In Japan, where raccoons established feral populations after escaping from captivity, the animals colonized urban areas by exploiting traditional architecture. In Kamakura City, raccoons invaded old wooden houses, Buddhist temples, and Shinto shrines by entering through air vents under the eaves and floors, building nests under the roofs.6Global Environmental Research. Present Status of Invasive Alien Raccoon and its Impact in Japan
The Kamakura raccoons also co-opted existing wildlife infrastructure. Drainpipes that had previously been used as travel corridors by native raccoon dogs became safe pathways for the invasive raccoons.6Global Environmental Research. Present Status of Invasive Alien Raccoon and its Impact in Japan Combined with easy access to garbage, ornamental fish ponds, and the shelter provided by traditional buildings, the urban environment proved ideal. The damage to culturally significant structures has been a serious concern, with raccoon urine and feces accumulating in the wooden frameworks of historic temples.
This pattern mirrors what happens in North American cities, just in a more culturally visible way. Raccoons everywhere are doing the same thing: finding the gap between the human-built environment and the natural one, and exploiting it for shelter and food. The specific structures differ, whether that is a Victorian attic in Ohio, a storm drain in Los Angeles, or a Shinto shrine in Kamakura, but the underlying behavioral logic is identical. Raccoons assess potential den sites for security, thermal protection, and proximity to food, and they are not constrained by any narrow definition of what constitutes a den.
Keeping Raccoons Out of Places You Do Not Want Them
Understanding where raccoons sleep translates directly into practical advice for managing them around your property. The research on lactating females and man-made structures makes one point clear: simply removing a raccoon and patching one hole is usually not enough. These animals maintain knowledge of multiple potential den sites, and suburban populations are dense enough that another individual will often discover the same entry point.
Effective exclusion focuses on eliminating access to the kinds of features raccoons look for:
- Roof gaps and fascia boards: Raccoons can pry open loose fascia and squeeze through surprisingly small openings. Heavy-gauge hardware cloth or metal flashing is more effective than wood repairs alone.
- Chimney caps: An uncapped chimney is an open invitation. Stainless steel chimney caps rated for wildlife exclusion are standard prevention.
- Crawlspace vents: The same air vents that raccoons exploited in Japanese temples are present in many North American homes. Reinforced vent covers prevent entry.
- Overhanging branches: Raccoons are excellent climbers and often access roofs via tree branches. Trimming branches back several feet from the roofline reduces access.
Timing matters, too. The worst time to seal up a den site is during spring, when a mother raccoon may have a litter of kits inside. Sealing the entry traps the kits, which creates an animal welfare problem and usually a much bigger structural problem as the mother tears the building apart trying to get back in. Wildlife control professionals typically recommend waiting until late summer or early fall, when kits are mobile enough to leave with the mother, or using one-way exclusion doors that allow animals to exit but not re-enter.
Reducing food attractants is the other half of the equation. Raccoons choose den sites partly based on proximity to food, so securing garbage cans with locking lids, removing outdoor pet food at night, and cleaning up fallen fruit from trees all make your property less appealing as a base of operations. You will not eliminate raccoons from a suburban neighborhood this way, but you can encourage them to den somewhere else.