West Yorkshire Fire and Rescue Service were called to Emmott Drive in Rawdon at 8pm on Saturday.
The alarm was raised after a fire alarm went off in the property, with further calls stating that the fire was in the kitchen and that the elderly woman inside was unable to get out.
Firefighters found a small fire in the kitchen on arrival.
The woman suffered smoke inhalation and was taken to hospital by ambulance.
Fire engines from Rawdon, Cookridge and Stanningley attended.