That’s according to the county’s Garda Chief, who attributes the rise to the release from prison earlier this year of a major player on the drugs scene.
Chief Supt Pat Sullivan also says the number of detections for drug offences in Kerry was down for 2015, due to a shortage of resources.
There was a significant number of heroin seizures in Kerry during 2015, with the majority of these occurring in Tralee and Killarney.
Some of those arrested in connection with the seizures, will appear before the circuit court in the new year.
Detections for cocaine use also rose during the year, and a number of people were arrested in the county in possession of crystal meth.
However, Chief Supt Sullivan said the number of cannabis-related arrests dropped by 15 percent in the last 12 months.
He said this was largely due to the imprisonment of one of the county’s main suppliers of the drug.
Chief Supt Sullivan also noted that in overall terms, the number of arrests for drugs offences was down during 2015, a decline he believes is due to a shortage of resources in the Garda Division’s drugs unit.