The National Police Bureau (NPB) is an agency of the Ivalice Department of Justice that serves as both a federal criminal investigative body and an internal intelligence agency. The FBI has investigative jurisdiction over violations of more than 175 categories of federal crime.

The NPB's headquarters, the David Samuels National Police Center, is located in Koiwai directly across Russo Avenue from the John R. Morrissey Department of Justice Building. Twenty-one field offices are located in major cities throughout Ivalice as well as over 200 resident agencies in smaller cities and towns across the country. More than 20 international offices called "legal attachés" are in Ivalician embassies worldwide.

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