Kato Zachlorou is a village and a community in eastern Achaea, Greece. It is built on a mountain slope on the left bank of the river Vouraikos, which forms a narrow gorge. The community consists of the villages Kato Zachlorou and Ano Zachlorou, and the Mega Spilaio monastery. It is south of Diakopto, and northeast of Kalavryta. In 2001 Kato Zachlorou had a population of 101 for the village, and 112 for the community. The narrow gauge Diakofto–Kalavryta Railway runs through the village.