Single Finder Facebook To begin you need a Facebook Group ID You can find easily a group ID by checking the URL of a Facebook Group. For example. You can even find ID for your facebook pages and groups. - Find My You simply need to paste your page or group URL in the box above. Below is Facebook ID finder can help you find your or someone's Facebook numeric user ID easily. For finding any facebook group_id or page_id or user_id go to inspect element of page and find these in meta tags. Group Id fb://group/.