More than £50,000 worth of drugs have been seized across the South West in a week of action.
Police say they made 90 arrests in total, with 38 of those in Dorset.
Forces have been targeting so-called 'county lines' drug dealers or criminal gangs from urban areas moving into smaller towns and rural locations.
Detective Inspector Charlotte Tucker, Regional Coordinator for County Lines, said: "It's clear there is targeted action being taken against Lines operating in our region.
"Equally important is the work done to identify vulnerable young people and adults being exploited by drug gangs."
Dorset Police and Crime Commissioner Martyn Underhill said: "County lines is a growing problem, not just in Dorset but across the country.
"It is something that the police can't tackle alone.
"We need the support of our communities to continue to provide information to Dorset Police about suspected drug-related offences."