The Americas Zone was one of the three regional zones of the 1973 Davis Cup. 12 teams entered the Americas Zone split across two sub-zones, the North & Central America Zone and the South America Zone. 5 teams played in each of the sub-zone's preliminary rounds, with two teams progressing to each sub-zone's main draw to join the previous year's finalists the United States and Chile. The winners of each sub-zone main draw then played against each other to determine who moved to the Inter-Zonal Zone to compete against the winners of the Eastern Zone and Europe Zone.