A manhunt is underway for the driver of a car who fled after a seven-year-old boy was hit by a car in front of a primary school.

The boy was taken to hospital after he was struck by a car in front of Campbelltown East Public School, in Sydney's south-west, at 3pm on Monday.

He was treated at the scene for before being taken to Campbelltown Hospital with non-life threatening injuries.

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A manhunt is underway for the driver of a car who fled after a seven-year-old boy was hit by a car in front of a primary school

The boy was taken to hospital after he was struck by a car in front of Campbelltown East Public School, in Sydney's south-west, at 3pm on Monday

Witnesses told police the female driver of the car stopped briefly on Valley Rd, did not offer assistance and fled the scene.

Police would like to speak to the driver of the red Mitsubishi Mirage who may be able to assist with their inquiries.

The woman is described as being of Caucasian appearance with an olive complexion and long brown hair.

Anyone with information or witnessed the incident is urged to come forward and contact Campbelltown Police Station on 4620 1199 or Crime Stoppers on 1800 333 000.