Police are appealing for public assistance to help locate a woman and baby missing from Wilson's Creek, near Mullumbimby.

Jordyn Parkins, 21, and her three-month-old son, Donnie McDonald, were last seen in a white utility vehicle driving on the M1 at Brunswick Heads about 3am on Sunday 4 June 2023.

Police hold serious concerns for their welfare and urge anyone with information about their location to come forward.

Jordyn is described as being of Caucasian appearance with a thin build and dark hair. She has tattoos across her leg, chest and arm.

Donnie is described as being of Caucasian appearance with thin dark hair.

Police believe they may be in the company of a 27-year-old man known to them.

Anyone with information about their whereabouts is urged not to approach them, but to contact Triple Zero (000) immediately.

Anyone with information about this incident is urged to contact Crime Stoppers: 1800 333 000 or https://nsw.crimestoppers.com.au. Information is treated in strict confidence. The public is reminded not to report information via NSW Police social media pages.