Harris County Precinct 4 Constable's Office deputies were called to a home on Shimmering Aspen Court near Kuykendahl just before 7pm.
According to authorities, the toddler was found in a pool at the location.
She was pulled from the pool and airlifted to the hospital in critical condition, officials said.
There is no word on how the girl ended up in the pool.
Please stay with Eyewitness News and abc13.com for updates as they become available.