Which ant species is the most common in the United States?

The Argentine ant is recognized as one of the most common ant species in the United States due to its adaptability and rapid reproduction. This species thrives in various environmental conditions and can establish large colonies, which allows it to dominate local ecosystems. Its ability to displace native ant species contributes to its prevalence across many regions, particularly in urban areas.

In addition, Argentine ants are known for forming supercolonies, which can span vast areas, further enhancing their commonality. This contrasts with other species listed, such as the Carpenter ant, known for its wood-destroying habits; the Pharaoh ant, which is more often found in indoor environments and health care facilities, and the Southern fire ant, a species primarily concentrated in the southeastern states. These factors explain the Argentine ant's recognition as the most common ant species in various parts of the U.S.