The Queen's Facebook page has attracted nearly 200,000 visitors since it launched on Monday.
Royalists and republicans alike have logged on to the social networking site to view images, videos and news about the British monarchy.
The page provides more than 191,700 users with information about royal events, visits and ceremonies, all searchable on a UK map. It also features the Court Circular - the authoritative record of the previous day's official royal engagements.
Sophy Silver, head of communications at Facebook, said: "The content they're putting up is great for a Facebook page, and it's good for them to be getting the information out there. When they put photos up on the site, they become part of the social graph and that's how you get people interested."
A spokesman for Buckingham Palace said: "It's part of our ongoing strategy to adopt social networking as a way of engaging people with what the Royal Family is doing. The important thing about Facebook is its international reach, as the Queen is Queen of 16 countries and head of the Commonwealth."
The Queen is perhaps Britain's most famous internet user. She has embraced technology and is said to email her grandchildren. But the Duke of Edinburgh is thought to be the real fan of computers and the internet, using them regularly.
The launch of the Facebook page shows how the monarchy is keen to take advantage of new developments online.
The move follows the introduction of the monarchy's Flickr account earlier this year. It also joined Twitter in 2009, where it has more than 70,000 followers, and established a Royal Channel on YouTube in 2007, now featuring more than 200 videos.
The Royal Family is not expected to find thousands of new "friends" on the site as a new page and not a personal profile has been created. Fans wishing to follow the monarchy can instead indicate they "like" the entry and will receive updates about new pictures and videos through their news feed.
The page is a collaboration between Buckingham Palace, Clarence House and the Royal Collection.