There's no copyright symbol on any common keyboard, but it's easy to insert the symbol whether you're using Windows or a Mac.

Windows includes a variety of special symbols that you can enter as text, even if they don't appear on keyboards. You can get a copyright and registered trademark symbols, which appear as a "C" or "R" ...

Your computer keyboard has about 64 keys on it. That’s great for letters and numbers—but what about symbols, like these? On the Mac, it’s worth learning them. Hold down the Option key and type 2 for ...