Two people were arrested and 18 searched by police as they carried out drugs raids in town on Saturday night.
Whitby based officers were joined by colleagues from the Neighbourhood Support Teamand a specially trained passive drugs dog.
The searches were carried out under the Misuse of Drugs Act.
A 26 year old male from Whitby and a 24 year old male from the Cleveland area were both arrested on suspicion of possession of a Class A drug.
A police spokesperson thanked the licensees and their staff who supported them during the operation and added they would be repeating this operation throughout the summer.