The driver lost control of the SUV, which spun out. The vehicle went off the road on the right-hand side of the highway, slammed into some landscaping then rolled over, according to DPS spokesman Bart Graves.
Officers said the woman who was driving was ejected through a window and died from her injuries. She has been identified as Guadalupe Najera Bautista, 33, of Phoenix. She was not wearing a seat belt, according to officers.
The front-seat passenger, identified as Eva Meza Reyna, 49, of Phoenix, was taken to St. Joseph's Hospital for treatment of minor injuries.
The children range in age from 5 to 10. All were treated for minor injuries.
Graves said none of the passengers was properly restrained.
"We do know that from the basics that we didn't see any car seats or child restraints in the car from what I could tell," according to DPS Officer Carrick Cook. "We're definitely going to interview the adults in this and find out why that is so."
No other vehicles were involved.