10 Best Ant Killers 2026 in the United States

The TERRO T300B Indoor Liquid Ant Killer is a highly effective solution for those dealing with indoor ant infestations. It comes with 12 bait stations, making it versatile and convenient to place around your home in ant-prone areas like baseboards, corners, and counters. The active ingredient, Borax, is designed to attract and kill various types of common household ants such as acrobat, crazy, ghost, little black, odorous house, and pavement ants.

The bait is easy to use with no setup required; simply place the bait stations where ants are most active. One significant advantage is that the bait is carried back to the colony by worker ants, ensuring that it eliminates not just the visible ants but also those hidden within the colony, thus providing a comprehensive solution to your ant problem. Users have reported noticeable reductions in ant activity within days. However, while it's highly effective for indoor use, it may not be suitable for outdoor applications.

Safety-wise, it's important to keep it out of reach of children and pets, as Borax, despite being a low-toxicity component, can be harmful if ingested. This product is ideal for those looking for an easy-to-use, effective indoor ant killer that provides quick and thorough results.

The Ortho Home Defense Insect Killer is a versatile spray designed to handle a wide range of household insects, including ants, making it a good choice for an all-around pest control solution rather than just an ant-specific product. It offers protection for up to 12 months indoors on non-porous surfaces, which provides impressive long-term prevention. You can use it both inside your home—in kitchens, bathrooms, and around entry points—and outside around your foundation or patio, giving you flexible options for tackling ants wherever they appear.

The included battery-powered Comfort Wand makes spraying easier and more controlled, so applying the product around your home involves minimal effort and mess. While it is marketed for indoor and outdoor use, care should be taken when applying indoors to avoid contact with food or sensitive areas. The product’s large 1.33-gallon size means it should last a long time, but it is also fairly heavy, which might be less convenient for some users.

This Ortho product is a reliable, long-lasting insect killer that covers ants among other pests and features an easy-to-apply spray system suitable for both indoor and outdoor use. It is important to follow safety instructions carefully, especially around children and pets.