The man driving a black Nissan Quashqai is said to have leant out of his window and hit her in the face before driving off quickly, turning left on to Micklegate and then right onto Priory Street.
It happened on Friday (28 December) at around 1pm.
Enquiries to identify the driver of the vehicle are ongoing, and officers are urging anyone who witnessed the information or has any details that could help the investigation to get in touch. Please call North Yorkshire Police on 101, select option 2 and ask for ‘Neighbourhood Service Desk’.
Please quote reference 12180240524 when sharing information.