This is a list of law enforcement agencies in Northern Ireland.

Police

• Police Service of Northern Ireland
• Ministry of Defence Police
• Belfast Harbour Police
• Belfast International Airport Constabulary

Bodies with police powers

• National Crime Agency
• Northern Ireland Security Guard Service
• Police Ombudsman for Northern Ireland

Bodies with limited executive powers

• Border Force
• Immigration Enforcement
• His Majesty's Revenue and Customs
• Driver and Vehicle Agency

Bodies with solely investigatory powers

• Office for Security and Counter-Terrorism
• Security Service
• Serious Fraud Office

Bodies hosted by the Association of Chief Police Officers

• National Wildlife Crime Unit
• National Counter Terrorism Security Office
• National Vehicle Crime Intelligence Service

Bodies hosted by territorial police forces

• National Domestic Extremism and Disorder Intelligence Unit
• Protection Command
• National Fraud Intelligence Bureau