The primary coordinate point for San Juan is located at latitude 18.4663 and longitude -66.1057 in San Juan Municipio.
The formal boundaries for the San Juan encompass a land area of 39.49 sq. miles and a water area of 6.92 sq. miles.
San Juan Municipio is in the Atlantic time zone (GMT -4).
The San Juan has a U5 Census Class Code which indicates populated place that is also a census designated place with the same name. It also has a Functional Status Code of "S" which identifies a statistical entity.