Administratively, it is in Vaxholm Municipality and Stockholm County.

The island consists of three parts: Ramsö itself, Ramsöholm and Ramsöberg.

Ramsöholm was separate from Ramsö until the 18th century, but is now joined to the rest of the island after the channel between the two was infilled.

It is served throughout the year by passenger ships of the Waxholmsbolaget, which call at the Ramsö pier and/or the Ramsöberg pier, providing a connection to Vaxholm town and Stockholm city.

This article about a location in Stockholm County, Sweden is a stub.