Pharaoh ants are very small in size, light yellow to red in color with black markings on their abdomen. Due to their extremely small size, they can be found in a diversity of places, appearing suddenly. They have a wide range of foraging and their nests are usually well hidden. They are very persistent, with large colonies.

Inside they are usually found in the kitchen and bathrooms, but workers are seen trailing along window sills, and baseboards. They can also be spotted near sources of water in the kitchen and bathrooms, counter tops, toilets, drains and sinks. They prefer to nest in recessed areas like wall voids, under some appliances, in wall outlets, under carpet for protection. They can also nest outdoors in lawns and gardens.