The FBI Indexes, or Index List, was a system used to track American citizens and other people by the Federal Bureau of Investigation (FBI) before the adoption of computerized databases. The Index List was originally made of paper index cards, first compiled by J. Edgar Hoover at the Bureau of Investigations before he was appointed director of the BI. The Index List was used to track U.S. citizens and others believed by the FBI to be dangerous to national security, and was subdivided into various divisions which generally were rated based on different classes of danger the subject was thought to represent. There is no indication the FBI stopped adding names onto its Index List before September 11, 2001.

After September 11, 2001, the date which the FBI added its Index List to the Terrorist Screening Database (TSDB) is unknown, while the FBI consolidates the TSDB from other lists and manages its information. The TSDB list is currently available to all U.S. national security agencies, while select information contained on the TSDB is sent to other nation states and international security agencies.