Patong Police were called to the hotel, on Rat-U Thit 200 Pi Rd, at 4:37am.
Officers and rescue workers from the Kusoldharm Foundation arrived to find the woman on the ground beside the car with multiple broken bones.
Police were told the woman had been drinking her her room with her husband. She went to stand on the balcony behind the room when she fell, landing on the car below.
The car, registered in Bangkok, had suffered damage by the impact, police noted.
Rescue workers transported the woman to Patong Hospital for treatment of her injuries, which were not described as serious.
Police are continuing their investigation with the intent of bringing legal procedures against her for damages.