She was pronounced dead at the scene.
Northumbria Police said they had launched a probe into the death.
A police spokeswoman said: “At around 8.40am on Saturday, September 25, police received a report from the ambulance service of an unresponsive two-year old at an address in Gateshead.
“Officers attended the scene, but tragically the child was pronounced dead.
“An investigation into the death is being carried out at this time.”