How to Find a User ID on Facebook
This wikiHow teaches you how to find the user identification number (user ID) of another person on Facebook. Go to https://www.facebook.com in a web browser. You'll need to be using a computer with a web browser to find a user ID.
4 Feb 2020 ... Type profile_id into the box and press ↵ Enter (Windows) or ⏎ Return (macOS). You will see the person's user ID to the right of “profile_id.”.