Police search for missing 17-year-old old

Missing 17-year-old Samantha Marnell. (Supplied)

A 17-year-old girl went missing in Newcomb on Wednesday prompting police to call for public help to find her.

Samantha Marnell was last seen in Newcomb about 4pm on 22 April, police said.

Police believe she could be somewhere in Geelong. They described her as 170cm tall with a thin build, blonde hair and blue eyes.

She was last seen wearing a white fitted mini dress with long sleeves and black boots, police said.

Police on Thursday released an image of Samantha in hope someone recognised her and could provide information on whereabouts.

They urged anyone with information about Samantha’s whereabouts to phone Geelong Police Station on 5225 3100.