10 Best Ant Killer Indoors 2026 in the United States

The Terro T300-3SR Liquid Ant Killer is a popular and highly rated option for controlling indoor ants. It uses liquid ant baits containing sodium tetraborate decahydrate (borax), which worker ants carry back to the colony, effectively killing both visible ants and those hidden from sight. This method targets the entire colony, not just the ants you see, making it a thorough solution. It is EPA approved, indicating a recognized safety standard, and the active ingredient is commonly used in ant baits, generally considered safe when used as directed around the home.

The Ortho Home Defense Insect Killer is a ready-to-use spray designed for both indoor and outdoor use, making it a versatile choice for tackling ants and other common household pests like cockroaches and spiders. It contains bifenthrin at 0.05%, a widely used active ingredient known for its insect-killing power. The product is easy to apply thanks to its battery-powered Comfort Wand sprayer, which provides a continuous spray, reducing mess and effort.

The TERRO T300B Indoor Liquid Ant Killer is a fast-acting solution designed to reduce ant activity within days. Utilizing 12 bait stations, it employs borax as the active ingredient, which is effective in attracting and eliminating common household ants, including those hidden in colonies that aren't immediately visible. This product's ease of use stands out, as it requires no setup—simply place the bait stations where ant activity is observed, such as along baseboards or on counters. This makes it a versatile option for various spots in the home.