I looked for this and couldn't find it.

Sorry if this has already been asked. Thanks for your help!

Click on the deck, in the top right corner there is an edit button click that a drop down menu will appear, click on rename.

Yes there is. First, go into the deck you want. You will see the deck name at the top and the list of cards you put into it. ALSO at the top but towards the right, you will see "IMPORT", "EDIT", "TOOLS", and "VIEW". The edit link will bring up a small window where you can rename your deck.

Thanks guys!