The Social Security Death Index (SSDI), provided by Infobases, Inc., is a searchable database of the Death Master File (DMF) from the Social Security Administration (SSA). DMF "contains over 50 million records created from SSA payment records." The database can contain name, social security number, date of birth, date of death, and last residence/lump sum payment information when available, and can be searched on those criteria. Search help is available from the home page. Note that this is not an index of everyone who has died in the United States, but rather an index of people who had Social Security Benefits when they died.