Police were called to a disturbance in Weir Road in Hanwood on Sunday before inquiries led officers to an address in Broxton's Wood, Westbury, where wraps of heroin and drug paraphernalia were found.
A 22-year-old man and a 17-year-old girl were arrested on suspicion of possession with intent to supply. They have been released on police bail.
Detective Sergeant Steve Miller, from Shropshire’s Local Organised Crime Team, said: “County Lines drug dealing sees people come from outside the area into rural towns to deal drugs, often preying on vulnerable people to use their address as a drugs den and using a dedicated telephone number as the line.
“As part of our campaign to tackle serious and organised crime, we will work relentlessly to pursue those involved to take out the line and arrest those involved.”