RCMP Cpl. Antonio Hernandez says the girl told a dispatcher her mother had fallen in the backyard and wasn't getting up.
He says the dispatcher kept the child on the line to get as much information as possible and was able to determine the location of the home and contact emergency services.
The mother was suffering a seizure and is said to be okay.
The girl was at home alone with her mother and two younger brothers at the time, while her father was at work.
She says her grandmother taught her how to dial 911. (CFAX)