Police, fire crews, lifeboat volunteers, and the ambulance service were all called out to the ruins on Thursday evening, at around 9pm.
The emergency services carried out a search of the area, and at 11.25pm, a coastguard helicopter arrived to assist the teams.
However, no individual was found and the search was called off.
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Dunbar’s RNLI lifeboat volunteers were called out to the scene at 9.30pm. The lifeboat conducted a search of the shore, near the area known as ‘the Maggie’, but was stood down at midnight.
A Police Scotland spokesperson said : “We received a call of concern for a person around 9.05pm on Thursday, 19 May, 2022 at Dunbar Castle.
"Extensive enquiries were carried out and there was no trace of anyone.”
A Scottish Fire and Rescue Service spokesperson said: "We were called at 9.15pm on Thursday, 19 May to assist emergency service partners at Castle Gate, Dunbar.
"Operations Control mobilised two appliances and a number of specialist resources to the scene."
The Scottish Ambulance Service have been contacted for comment.