Posto Santo is a parish in the municipality of Angra do Heroísmo on the island of Terceira in the Azores. The population in 2011 was 1,048, in an area of 20.37 km². Posto Santo was elevated to parish status on 15 September 1980. It was previously part of the parish of Santa Luzia. The parish is relatively far from the ocean, and it lies at an elevation of forty-five metres.