Meadow Springs came top with 892 infringements. Mandurah had 300 infringements.
Other zones in the top five were Brentwood (483), Belmont (401) and Melville (300).
With children returning to school this week, the State Government reminded motorists to slow down and not endanger lives.
Road Safety Minister Liza Harvey also announced the latest round of 452 WA schools to have flashing 40kmh signs installed.
The $36 million project, funded through the Road Trauma Trust Account, represents the biggest procurement of electrical components ever undertaken by Main Roads.
Mrs Harvey said most of the motorists fined were exceeding the speed limit by 10 to 19 km/h.
n Last year, five motorists were caught speeding in Meadow Springs school zones 30-40km/h over the limit and 2043 motorists were caught speeding through the zones in 2013.