Officers are appealing for information about a man they would like to speak to in connection with an incident in Oxford Road, Clacton on Sunday, May 7.
A 13-year-old girl crossed the road near to Travis Perkins Trading and was struck by a small blue car.
The car was reported to have stopped briefly and a man spoke with the girl before returning to the car and driving off.
The man is described as white, with grey hair and is thought to be in his 40s.
The girl was treated for minor injuries.
Anyone with information is asked to contact Pc Richard March on 101 or Crimestoppers anonymously on 0800 555 111.