Yamasá is a municipality (municipio) of the Monte Plata province in the Dominican Republic.

It includes the municipal district (distrito municipal) of Los Botados.

[3] Yamasa is north of the capital city of Santo Domingo.

The Rio Ozama, one of Dominican Republic's longest rivers, passes through Yamasa.

Primarily a rural agriculture community, sugar cane, plantains and mangoes are common staples grown in Yamasa.