The Genealogy & Historical Groups/Pages on Facebook is a vast compendium of Facebook pages where you can connect with other researchers who share an interest in a specific topical area. This includes the US and all its states and territories, many foreign countries, and a wide array of specialized topics. You must have a free Facebook account in order to use Facebook. Some of these groups are closed access and may require you to request to join the group. All of these sites are in English.