Russell Frankland, 40, fled just before 5pm on Thursday, after appearing in court on charges of robbery and burglary, alleged to have been committed in Scarborough last month. He had been remanded in custody to appear at York Crown Court on December 19.
Frankland is described as white, 6ft tall with a medium build and brown hair.
Although it is believed Frankland may still be in Scarborough, he also has links in the Rochdale area of Lancashire.
Det Inspector Paul Healy of Scarborough CID, said: “Russell, if you see or hear this appeal, I want you to hear this clear message. We are going to catch you and return you to custody. Hand yourself in now, by remaining at large you are only delaying the inevitable and making matters worse for yourself.
“I am also appealing to anyone who sees Frankland to contact the police straight away.”
Mr Healy added: “If you are helping to shield Frankland from the police, you are not helping him. In fact you may be even committing offences yourself. If this is the case, you face the prospect of arrest and prosecution.”
Anyone who can help to locate Russell Frankland should contact North Yorkshire Police on 101, or Crimestoppers anonymously on 0800 555111, quoting reference number 12140209790.