Mosquitoes were collected with human bait, animal bait, and CO2-baited light traps during a 13-month period in 5 villages located along the Myanmar border in southern Thailand. Altogether, 11,608 adult females consisting of 21 anopheline species were collected. Abundance of species varied according to the village where collections were made. In one village that was studied most intensely, Anopheles minimus was the most commonly collected species, representing 55.6, 10.6, and 56.5% of the human bait, cattle bait, and light trap collections, respectively. In addition, An. minimum was abundant throughout the year, whereas Anopheles maculatus was most commonly collected in July and August coincident with the rainy season. Anopheles sawadwongporni, abundant at the beginning and the end of the rainy season, was most commonly collected in June. Anopheles dirus was most abundant in April; however, it represented only 3.6% of all mosquitoes collected that month. Of 813 females collected in Palao-U Village and dissected, 38.9% were parous.