National Security Bureau

National Security Bureau or Security Bureau may refer to:


 * National Security Bureau (Poland), an agency that executes the tasks given by the president of the Republic of Poland regarding national security
 * National Security Bureau (Slovakia), a bureau responsible for protection of confidential data, the introduction and use of the electronic signature and cipher service in the Slovak Republic
 * National Security Bureau (Taiwan), the principal intelligence agency of Taiwan
 * National Police Agency Security Bureau, a branch of the Japanese National Police Agency
 * Security Bureau (Hong Kong), a bureau in Hong Kong responsible for the maintenance of law and order, immigration and customs control, rehabilitating offenders and drug abusers, and providing emergency fire and rescue services
 * National Security Bureau of the Arab Socialist Ba'ath Party – Syria Region, a bureau of the Regional Command of the Ba'ath Party in Syria