The part of the frame where the door is attached is called the hinge jamb.

More generally, here are the key terms so you can describe it clearly:

  • Door frame – The entire structure around the door opening (top, sides, and sometimes bottom).
  • Jambs – The vertical sides of the frame.
* **Hinge jamb** – The vertical side where the hinges are fastened and where the door is physically attached.

* **Strike jamb** – The opposite side, where the latch and strike plate are.

So if you’re trying to “name the part of the frame where the door is attached,” the precise term is hinge jamb , and in casual conversation people may simply say “the door jamb.”

Information gathered from public forums or data available on the internet and portrayed here.