Current draw of Uno

When connecting a 9V battery to the VIn/Gnd pins, I measure a current of about 120mA being drawn. Nothing is connected to any other pins.

Is this expected? I've read that my Arduino should be drawing around 40mA with no load...

That seems high, not expected. 40mA would indeed be more like it, but that would be for 5V connected directly to the 5V pin, bypassing the regulator. I've made measurements of that in the past, but not of current into the Vin pin. The regulator will consume some, but I wouldn't expect nearly that much.

Which model Uno? Where did it come from? Is it new, or have you been using it? If so, does it work OK? What else have you tried with it?