The insecticidal activity of 4 mosquito coils containing pyrethroid ester insecticides and 1 mosquito coil containing 15% citronella oil was evaluated against adult female Anopheles albimanus, Aedes albopictus, and Culex quinquefasciatus. Two of the pyrethroid mosquito coils containing 0.08% meperfluthrin showed the strongest insecticidal activity, and all 4 pyrethroid coils produced significantly higher mortality than the citronella coil across all 3 test species.