The girl was left unattended near the pool of an apartment complex in the 12800 block of Perry Road at about 7:47 p.m., police said.
Officers said another child saw the girl in the pool, jumped in and pulled her out to safety.
ABC13 is working to learn more on how the child is doing. It was unclear if anyone will face any charges.
SEE RELATED STORY: Apartment complex owners cited after 3-year-old drowns in nasty pool in north Harris County