Corrections officers at Collins Bay Institution near Kingston have prevented illegal items from entering the prison.
Correctional Services Canada says on Monday evening, a package was seized at the perimeter of the maximum security unit.
Officers seized two cell phones and chargers, 83.3 grams of tobacco and 83.3 grams of marijuana.
The total estimated institutional value of the seizure is $11,000.
The CSC introduced a complete smoking ban in all federal correctional institutions in 2008.
Police and CSC are continuing to investigate.