A black iPhone 4GS was stolen from the Orange Shop on Cambridge Street, in the town, at around 4pm on Saturday 10 March 2012.
The suspect is an Asian woman, around 5ft 2in tall with dark hair which was tied up. At the time she was wearing a grey jacket, a black skirt, black tights and black shoes and was carrying a grey bag.
PC Ben Ralston, of Harrogate Safer Neighbourhood Team, said:
If you recognise the woman in the CCTV still please contact the police or Crimestoppers straight away.
I know that there were other people in the store at the same time and ask them to contact the police if they saw any suspicious behaviour.
If you can help to identify the woman please contact Harrogate police on 101, press option 2 and ask for Ben Ralston.
Or call Crimestoppers anonymously on 0800 555 111 quoting reference number 12120038297.