The National Bureau of Investigation (NBI) is a national law enforcement agency of the Finnish Police and the principal criminal investigation and criminal intelligence organization of Finland. The Bureau's main tasks are to counter and investigate organized crime, provide expert services, and develop methods for criminal investigation. NBI is also responsible for financial intelligence (FININT), such as preventing money laundering and terrorism financing. NBI headquarters has been situated in the city of Vantaa within the Capital Region since 1994 with field offices in Tampere, Turku, Mariehamn, Joensuu, Oulu and Rovaniemi. It is subordinate to the National Police Board under the jurisdiction of the Interior Ministry.

The Police of Finland is a national government agency responsible for general police and law enforcement matters in the Republic of Finland. The Police of Finland is subordinate to the Ministry of the Interior and consists of the National Police Board, two national police units and 11 local police departments.