Euaresta is a genus of flies in the family Tephritidae that live in plants of the closely related genera Ambrosia, Xanthium, and Dicoria, and feed on their flowers and seeds. The 15 species of Euaresta are endemic to the Americas, eight being native to North America and seven to South America. Only one specimen has been collected in Central America (E. toba in El Salvador), and one or two species occur in the Antilles.