The 6 Best Flea Collars for Dogs

Keep unwanted critters away from your canine

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Our Top Picks
"One collar offers eight months of protection."
"Uses the essential oils of geranium, peppermint, and clove."
"Designed for dogs 18 pounds and under and works to prevent pests."
"Starts to kill fleas at all stages of the life cycle within 24 to 48 hours."
"Every collar has a strip that reflects direct light up to 450 feet."
"Attaches to your pup’s existing collar to ward off fleas, ticks, and mosquitos."

Best Overall: Seresto 8 Month Flea & Tick Prevention Collar for Large Dogs

One of the most popular flea collars online, the Seresto Flea and Tick Collar for Dogs is an effective choice that’s easy to use and kills fleas, ticks, and more. One collar offers eight months of protection, saving you the hassle of reapplying a topical treatment or giving your dog a pill. It’s non-greasy, odorless, and continuously releases low concentrations of its active ingredients across your dog’s skin and through their coat. It’s also water-resistant and will remain effective even after a bath or swim (although there may be an impact on how many months it lasts). Most importantly, it kills fleas within 24 hours of application, and reinfesting ones within two hours.

Customers write that the Bayer Seresto Flea and Tick Collar for Dogs is the first product they’ve used that actually kills fleas. It’s available in sizes for both large and small dogs and is equally effective against ticks. While it’s one of the higher-priced flea collars you’ll find, it’s our pick for the best overall product of this type.

Best Natural: Arava - Dead Sea Pet Spa Arava Flea & Tick Prevention Collar

Worried about using a flea collar that includes chemicals that could be harmful to small children (or even your pet)? There are plenty of collars using alternative formulations based on all-natural ingredients—and while they may not kill these pests, they can do a great job of repelling them. The Arava Flea & Tick Prevention Collar uses essential oils of geranium, peppermint, clove, and other non-scary ingredients, which work to keep fleas and ticks away from your dog’s fur. They’re released via absorption into the skin, with protection lasting for up to six months. Since it won’t kill ticks, it’s not appropriate for those dealing with an infestation—but it’s a great first line of defense, and can be effectively paired with a flea shampoo for a more complete protection plan.

Customers write that they were happy to discover a natural solution to flea control, allaying any fears of using it around kids or potentially causing harm to their pet. Just as important—it works, successfully keeping pests at bay even without the use of chemicals. While it has a noticeable smell, owners mention that it’s actually fairly pleasant and reflective of its botanical ingredients.

Best for Small Dogs: Seresto 8 Month Flea & Tick Prevention Collar for Small Dogs

Anyone with a small breed knows how difficult it can be to find products that fit miniature bodies. The Seresto 8 Month Flea & Tick Prevention Collar is designed for dogs 18 pounds and under and works to prevent fleas and ticks for up to eight months. It starts working against fleas within 24 hours of initial application and ticks within 48 hours and both kills active infestations and prevents future ones. Each 15-inch collar is odorless and non-greasy with a reflective strip for added visibility at night. The two active ingredients are imidacloprid (for flea infestations) and flumethrin (to fight ticks). The collars are also water-resistant, so you won’t need to take it off during baths.

If you’re hunting for a comfortable and effective collar for petite pups and puppies, the Seresto collar is a great choice. Owners appreciate how effective this little collar is, stating that it works through the height of flea season and is safe and irritant-free.

Best Fast-Acting: Rolf Club 3D Flea Collar for Dogs

If your dog is itching and scratching, you don’t have time to wait around for flea products to kick in. The Rolf Club 3D Flea & Worm Collar for Dogs is a fast-acting collar that starts to penetrate deep and kill fleas at all stages of the lifecycle within 24 to 48 hours. Each collar provides six months of protection and fights ticks, mosquitos, lice, and fleas. It’s odorless and comes in three sizes, depending on the weight of your dog, and fits up to 30 inches around. Once you adjust the collar to your dog’s neck, you can cut off the excess material for a perfect, comfortable fit.

When your pet has an active flea infestation, using a fast-acting collar in conjunction with a flea shampoo or medicine can provide your pup much-needed relief and protect against future pests.

Best Reflective: Hartz UltraGuard Pro Flea & Tick Collar for Dogs and Puppies

Whether you and your pup enjoy late-night walks or you’ve got an escape artist on your hands, a flea collar with a reflective strip can help keep your dog safe in more ways than one. Hartz UltraGuard Pro Flea & Tick Collar with Reflect-X Shield for Dogs protects your dog against fleas, ticks, and eggs for up to seven months, keeping your pup itch-free for over half a year. It’s water-resistant and is suited for dogs over 12 weeks old. But the best part? Each collar has a strip that reflects direct light up to 450 feet, giving it an extra layer of safety for your furry friend. Once on your dog, it will begin killing live fleas immediately and work to prevent nesting after three days.

Owners say the Hartz UltraGuard is a cost-effective way to combat fleas in pups of all sizes. They say the reflective strip is a major plus, but what’s most important is that it works.

Best Collar Tag: Only Natural Pet Easy Defense Flea & Tick Tag for Dogs and Cats

If you're looking for an alternative to a traditional flea collar, you might want to check out the Only Natural Pet EasyDefense Collar Tag, which attaches to your pup’s existing collar to ward off fleas, ticks, and mosquitos. It’s chemical free and safe for sensitive skin, so you don't have to worry about irritation or allergic reactions. Once you place an EasyDefense Collar Tag on your dog, it takes three weeks for it to start working, but will prevent fleas and ticks for up to a year when it's worn every day. This natural repellant uses frequencies, or small vibrations, to irritate and repel pests. The frequencies of this tag will harmonize with your dog's frequencies, so it won't bother them. It’s safe for dogs of all ages, and won’t get in the way of harnesses or leashes.

Though it won’t kill active infestations (it will only prevent future bites), reviewers say the EasyDefense Collar Tag is a great defense against fleas, ticks, and mosquitos. And for customers who live in warmer areas where mosquitos can be a problem, having a collar tag that does double duty is important. Many dog owners also use it when their pups are allergic or sensitive to other preventive measures.

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