The total area is 157.81 km² (60.93 mi²), spread over an east-to-west extent of about 420 km (261 mi).
A naval station in the south of Socorro Island has a population of 45 (staff).
On Clarión is a small naval garrison with nine men.
The islands are otherwise uninhabited.
The islands are named after Don Juan Vicente de Güemes, 2nd Count of Revillagigedo, the 53rd viceroy of New Spain.

The three eastern islands are called the inner islands.
They fall in the time zone UTC-7 (Mountain Time), while the major part of Colima is UTC-6 (Central Time Zone).
Clarión is comparatively far to the west, by more than 200 km in comparison with the inner islands, and in UTC-8 (Pacific Time Zone).
The Revillagigedo Islands are one of three Mexican island groups in the Pacific Ocean that are not on the continental shelf; the others are Guadalupe Island and Rocas Alijos.
The total area is 157.81 km² (60.93 mi²), spread over an east-to-west extent of about 420 km (261 mi). A naval station in the south of Socorro Island has a population of 45 (staff). On Clarión is a small naval garrison with nine men. The islands are otherwise uninhabited. The islands are named after Don Juan Vicente de Güemes, 2nd Count of Revillagigedo, the 53rd viceroy of New Spain.
The three eastern islands are called the inner islands. They fall in the time zone UTC-7 (Mountain Time), while the major part of Colima is UTC-6 (Central Time Zone). Clarión is comparatively far to the west, by more than 200 km in comparison with the inner islands, and in UTC-8 (Pacific Time Zone). The Revillagigedo Islands are one of three Mexican island groups in the Pacific Ocean that are not on the continental shelf; the others are Guadalupe Island and Rocas Alijos.
Revillagigedo Islands