How Long Do Ticks Live? By Species and Life Stage

The answer depends on which tick, which stage and where it is. A tick in damp leaf litter can outlast a tick on a kitchen floor by months, and a tick in a hot dryer lasts minutes. The table below sets out the figures that extension services and research papers actually publish.

How long each common tick lives

Two things stand out. Ticks feed only briefly: CDC states that after hatching, ticks must eat blood at every stage to survive, but each meal is a single sitting of a few days to a few weeks. And the long lives are mostly waiting. The Connecticut Agricultural Experiment Station’s Tick Management Handbook puts it directly: feeding for only a few days, the majority of a tick’s life is spent off the host, seeking a host, moulting or passing through an inhospitable season.

The two-year life of a blacklegged tick

The blacklegged tick is the main carrier of Lyme disease in the east, and its calendar explains when people are at risk. Its Pacific coast relative, the western blacklegged tick, generally takes three years, according to CDC. The Minnesota Department of Health describes a life of about two to three years with only up to three blood meals:

1. Year one, spring and summer. Eggs hatch into larvae, which feed once, usually on mice or birds. A larva can pick up the Lyme bacterium from an infected white-footed mouse at this meal. It then moults into a nymph and rests until the next spring.
2. Year two, late spring. Nymphs take their second meal from small or large mammals, people included. In Minnesota, nymphs peak from the end of May through June.
3. Year two, autumn. Fed nymphs moult into adults, which feed on large mammals such as deer. Females mate, lay hundreds to thousands of eggs, and die. Males die after mating.
4. Some adults wait until the following spring. Adults that do not feed in autumn survive the winter and quest again in spring, and can be active on warm winter days above freezing.

The Connecticut handbook gives the north-eastern timing: eggs laid in May, larvae peaking in August, and nymphs most active in May, June and July. Because the nymphs come out before that year’s larvae, infected nymphs pass the bacterium to mice that then infect the next generation. Our tick identification guide shows how to tell the stages apart.

Each stage, day by day

UF/IFAS publishes the most complete stage-by-stage timings for any common US tick, for the American dog tick. Waiting time is left out of the chart below, because it can be anything from days to two years.

The whole cycle needs three hosts and at least 54 days, but can take up to two years depending on host availability, host location and temperature. A fed female lays 4,000 to 6,500 eggs on the ground, then dies. The lone star tick follows a similar pattern: the Pennsylvania Department of Environmental Protection gives 9 to 27 days for a fed larva to moult, 2 to 6 weeks for a fed nymph, and 7 to 16 days from a female’s last meal to egg laying.

How long do ticks live without a host?

Months, and for some species years, provided the air is humid. This is the part of the question that surprises people.

The Connecticut handbook records that American dog tick larvae, nymphs and adults may live up to 540, 584 and 1,053 days respectively without feeding, although typical survival is much shorter. UF/IFAS gives working figures of 11 months for larvae, 6 months for nymphs and 2 years for adults. Ohio State researchers reported in 2026 that some unfed control ticks kept at ideal temperature and humidity in the laboratory survived for more than a year.

Most never get that far. CDC notes that most ticks die because they do not find a host for their next feeding, and the Connecticut handbook says most hard ticks perish within months or a year or two at best. Soft ticks are the outliers: the handbook notes some can survive many years without a host.

Humidity decides it

Water loss is what kills an unfed tick. In laboratory work cited by the Connecticut handbook, blacklegged nymphs survived for over 6 months at 93 to 100 per cent relative humidity, but over half died in less than 4 days at 65 per cent. That is why leaf litter matters so much: a 2022 Maine field study found snow cover and leaf litter both significantly improved the overwinter survival of blacklegged nymphs. Our guide to what attracts ticks covers the yard features that keep that humidity in place.

Do ticks drown?

Not quickly. In a 2019 Old Dominion University study, unfed adult lone star ticks survived up to 70 days submerged in fresh water, 64 days in brackish water and 46 days in salt water. The authors concluded that short-term flooding of less than a week would not be likely to eliminate them.

How long can ticks live in a house?

Usually days to a few weeks, because indoor air is too dry. Ohio State’s 2026 floor study measured it for the first time: unfed lone star ticks averaged about 11 days on common floor types and Gulf Coast ticks about 18. We cover that study, the species differences and what to do in detail in can ticks live in your house. The exception is the brown dog tick, which UF/IFAS says can complete its whole life cycle indoors where a dog lives, in just over two months, with two generations a year on average.

How long can a tick live on a dog?

An attached tick stays only as long as it takes to feed, then drops off to moult or lay eggs. For an adult female American dog tick that is 5 to 14 days, according to UF/IFAS; the Connecticut handbook gives 10 to 12 days. Brown dog tick females feed for about a week. American dog tick males continue to take small amounts of blood and do not swell like females. Ticks found on a dog week after week are far more likely to be new arrivals than one long-lived tick, and repeated ticks on an indoor dog point to brown dog ticks, which UF/IFAS says usually need professional treatment once an infestation has started. Your vet should advise on tick preventives for the dog itself.

How long do ticks live on humans and on clothes?

Timing matters on the body because disease transmission takes time. CDC says that in most cases a tick must be attached for more than 24 hours before the Lyme disease bacterium can be transmitted, and the Minnesota Department of Health gives 24 to 48 hours, noting that less common infections such as anaplasmosis may take less time. Nymphs are the highest risk, CDC adds, because they are abundant, about the size of a poppy seed, and quest from April through July.

The laundry figures come from a CDC study that tested the older advice of an hour in the dryer. All blacklegged nymphs and adults died after 4 minutes on high heat with dry towels, with an upper confidence limit of 6 minutes; CDC’s public advice is 10 minutes. If a rash or fever follows a bite, CDC advises seeing a doctor and saying when and where the bite happened.

When ticks are active through their lives

Because a tick lives for years but feeds for days, what you see in any month reflects which stage is questing. Our analysis of iNaturalist research-grade records shows the two patterns.

American dog tick records climb steeply from April, peak in May at an index of 368 and fall away by August, matching the UF/IFAS season of mid-April to early September for adults. Blacklegged tick records are almost the reverse: highest in November (251) and October (185), with a spring peak in March (165), when the adults that waited through winter quest again. These are sightings, mostly outdoors, not counts of ticks in homes.

Where professional help fits

Outdoor ticks are a habitat and personal protection problem, and yard treatment reduces tick numbers without guaranteeing fewer bites; our tick control cost guide covers what programmes involve. Indoor brown dog tick infestations are a job for a licensed professional working alongside your vet. One newer species deserves its own note: the Asian longhorned tick can start a population from a single female, so its numbers can build faster than the life cycles above suggest.

Frequently asked questions

How long can ticks live in a house?

Most outdoor ticks live days to a few weeks indoors, because household air is too dry. In a 2026 Ohio State study, unfed lone star ticks averaged about 11 days on household floors and Gulf Coast ticks about 18. Blacklegged nymphs can die within days in dry air. The brown dog tick is the exception: it can live and breed indoors for as long as a dog is there to feed on.

How long do ticks live without a host?

Often months, sometimes years, if the air is humid. UF/IFAS says unfed American dog tick adults can survive two years, and the Connecticut Agricultural Experiment Station records survival up to 1,053 days. Blacklegged nymphs lasted over 6 months at 93 to 100 per cent humidity in the laboratory but mostly died within 4 days at 65 per cent. Most ticks die before finding their next host.

What kills ticks immediately?

Heat comes closest. In CDC tests, every blacklegged nymph and adult on dry clothing died within 4 minutes in a dryer on high heat, and a wash at 130°F (54°C) or hotter killed them all. For a tick removed from skin, CDC advises putting it in alcohol, sealing it in a container, wrapping it tightly in tape or flushing it, and not crushing it with your fingers.

What smell do ticks hate most?

No scent has been shown to protect people as well as EPA-registered repellents, which CDC lists as DEET, picaridin, IR3535, oil of lemon eucalyptus, para-menthane-diol and 2-undecanone. Permethrin is different: it is applied to clothing and gear rather than skin, following the label, and repels and disables ticks that crawl onto the fabric. Our guide to what attracts ticks sets out the trial results.

What is a ticks worst enemy?

Dry air. Ticks die from water loss far more often than from predators, and CDC notes that most die without finding their next host. The popular claim that opossums eat thousands of ticks came from a laboratory study; when researchers searched the stomachs of 32 wild opossums in Illinois in 2021, they found no ticks, and none of 23 earlier diet studies had reported any.

Sources

• Centers for Disease Control and Prevention, Tick Lifecycles; Preventing Tick Bites; Removing a Tick; How Lyme Disease Spreads.
• Minnesota Department of Health, Ticks: Blacklegged Tick Life Cycle; Feeding and Blood Meals, updated 2025.
• Stafford KC III, Tick Management Handbook, Bulletin No. 1010, Connecticut Agricultural Experiment Station, revised 2007.
• UF/IFAS Extension, EENY-443 American Dog Tick, Dermacentor variabilis (Chan and Kaufman), revised August 2024.
• UF/IFAS Extension, EENY-221 Brown Dog Tick, Rhipicephalus sanguineus, revised February 2020.
• Pennsylvania Department of Environmental Protection, Vector Management: Lone Star Tick.
• South Dakota Department of Health, Lone Star Tick fact sheet.
• Ohio State University College of Veterinary Medicine, Some ticks can survive from 1 to 3 weeks on home flooring, March 2026; Sabet, Pesapane and Ward, Journal of Vector Ecology, 2026.
• Bidder LA et al., Assessing the underwater survival of two tick species, Amblyomma americanum and Amblyomma maculatum, Ticks and Tick-borne Diseases 10(1), 2019.
• Volk MR et al., Microclimate conditions alter Ixodes scapularis overwinter survival across climate gradients in Maine, Ticks and Tick-borne Diseases 13(1), 2022.
• Nelson CA et al. (CDC), The heat is on: killing blacklegged ticks in residential washers and dryers to prevent tickborne diseases, Ticks and Tick-borne Diseases 7(5), 2016.
• Hennessy C, Hild K, Are Virginia opossums really ecological traps for ticks? Groundtruthing laboratory observations, Ticks and Tick-borne Diseases 12(5), 2021.
• Keesing F et al., Hosts as ecological traps for the vector of Lyme disease, Proceedings of the Royal Society B 276, 2009.
• The Pest Control Brief analysis of iNaturalist research-grade records, pulled October 2026.