Police responded to the home in the 2000 block of Bluejacket Way at 7:19 p.m.
The girl had fallen into the family's swimming pool and was taken to Regional Medical Center in San Jose where she was later pronounced dead.
Police do not suspect that there was foul play involved in her death, but are continuing to investigate.
Anyone with information about the incident has been asked to call San Jose police at (408) 277-8900.
