The Scottish Crime and Drug Enforcement Agency (SCDEA) was a special police force of Scotland responsible for disrupting and dismantling serious organised crime groups.

The Police, Public Order and Criminal Justice (Scotland) Act 2006 put the SDEA on a statutory footing and renamed it as the Scottish Crime and Drug Enforcement Agency, funded through the Scottish Police Services Authority.

Some functions were shared with the Home Office Serious Organised Crime Agency (SOCA), but SOCA required permission from the SCDEA or the Lord Advocate to conduct certain operations.

The SCDEA was headed by a Director General and Deputy Director General, who as members of the Association of Chief Police Officers in Scotland formed the core of the Policy Group (the Executive of the SCDEA.)

The SCDEA had created several units and officials responsible for expanding its role in preventing serious crime in Scotland: