Let's start by agreeing on something fundamental: Facebook does not own your images. That is not how copyright or life operate. They are still your images, not those of Facebook. In truth, Facebook's terms of service state explicitly that "you own all of the material and information you share on Facebook."
However, as part of its Terms of Service agreement, Facebook does have the right to use any images you post on their website. This is common practice for social networking sites when they want to display a profile photo for a user. However, even with this exception, your images remain yours to do with as you please.
That being said, there are ways in which Facebook may be able to claim ownership over your images. For example, if you use the Facebook-owned photo sharing site, Instagram, to upload an image and then tag someone in it, then they might be able to claim ownership over that image too. Again, this only applies to images you directly upload to Facebook, not images found elsewhere on the web that happen to contain your Facebook username/id.
In conclusion, yes, Facebook owns the copyright to your photos.
According to Facebook's policies, you own any material, including images, that you upload online. Them does, however, declare in its terms and conditions that you grant it the right to "use" your material, which can be transferred or sub-licensed to its partners. This means that anything you post on Facebook becomes their property.
If you delete your post, they will also delete any associated images. However, if you use the archive feature, then these images will remain with Facebook and may be used by them or their partners.
In addition, Facebook claims ownership of any photos you tag in posts. These photos too will be deleted if you delete the post that contained them.
Finally, Facebook reserves the right to use photos from your profile anywhere within its empire - so if you have a professional photography business, then you should avoid uploading identifiable images of yourself or members of your family.
After all, you cannot control how Facebook will use your content once you have shared it with them. They can repurpose it in any way they see fit. And since you granted them this right, they can reuse your image in any number of ways, which we'll discuss later in this article.
According to Section 27 of the Copyright Act, "[i]t is an infringement of copyright for any person to do anything that, under this Act, only the owner of the copyright has the right to do without the approval of the owner of the copyright." So, in general, if you share a photo on Facebook without the consent of the copyright owner, you are breaking the law. However, there are exceptions to this rule. For example, you can share a photo on Facebook without permission if it is "fair use" or falls under other exemptions to copyright infringement.
Fair use is a legal doctrine that allows for limited use of copyrighted material without having your action considered copyright infringement. Examples of fair use include commentary on matters of public interest, criticism, news reporting, research, teaching, and library materials. If you plan to share a photo on Facebook and want to be sure it isn't copyrighted, check with the copyright holder first by searching the U.S. Library of Congress website. If they have not posted a notice regarding their refusal to license their work, then you are free to share it on Facebook!