Is my face sagging as a result of weight loss? What can be done to remedy this? (photos)

Hello, you will most likely need a combination of volume replacement to the face and skin tightening. I would start with volume replacement first as this is relatively easy with the use of fillers. Good Luck. 

It's best to start with revolumizing your face. This is achieved with fillers and/or fat transfer and/or implants. A facelift is likely too much at this time. Skin tightening with non-invasive radiofrequency devices is another good approach in addition to what I just mentioned.