The group was arrested after heroin, cocaine and cannabis worth about Â£192,000 was seized following a major police operation in 2014.
It involved the supply of drugs from the Torry area of Aberdeen.
The men were jailed at the High Court in Glasgow after pleading guilty to drugs offences. Three other men received non-custodial sentences.
Michael Clark, 28, was locked up for five years and two months.
Jaimie Campbell, 21, was sentenced to three years and seven months.
Kevin Tolmie, 30, was jailed for two-and-a-half years, while Lee Nicol, 23, was sentenced to two years and five months.
Scott White, 29, was jailed for 18 months and Lee Hulse, 21, sentenced to 13 months.
Stewart Sutherland, 24, Alexander MacPherson, 28, and Gary Clark, 33, were handed community payback orders.
Det Supt Martin Dunn said: "This was a significant operation as it involved the dismantling of a well-established group in the Torry area of Aberdeen, which was distributing drugs throughout the north east."
Six men involved the supply of drugs in Aberdeen have been jailed for a total of more than 16 years.