Understanding the Social Security Death Index

What Is the Social Security Death Index?

The Social Security Death Index (SSDI) is a database of death records submitted to the Social Security Administration (SSA). It was created to track deaths for benefit termination purposes but has become an invaluable genealogical tool. The index contains information on millions of deceased individuals, primarily those who had Social Security numbers and whose deaths were reported to the SSA.

What the SSDI Contains

Each entry in the SSDI typically includes:

Full name of the deceased
Social Security number
Date of birth
Date of death
Last known residence (zip code)
Where the death benefit was sent (often the state of death)

Some entries include less information, especially for deaths reported before computerized records became standard.

Coverage and Limitations

What the SSDI Covers

Deaths reported to the SSA, primarily from 1962 onward (when computerized records began)
Some deaths from as early as 1936, when Social Security was established
Approximately 94 million records as of recent counts

What the SSDI Does Not Cover

The SSDI is not a complete list of all American deaths. Notable gaps include:

People who never had a Social Security number (uncommon after 1940 but possible)
Deaths not reported to the SSA (this happens more than you might expect)
Recent deaths removed from public access (since 2011, the SSA has restricted access to records for deaths within the past three years)
Deaths before 1962 are spottily covered

How to Search the SSDI

Online Access

The SSDI is searchable through several genealogy websites and platforms. Basic searches are often free and allow you to search by:

Name (first and last)
Date of birth (or date range)
Date of death (or date range)
State of last residence
Social Security number (if known)

Search Strategies

Use partial information. If you know only a last name and approximate death year, that may be enough to locate the right entry.
Try name variations. The SSDI reflects whatever name was associated with the Social Security number, which might differ from the name used in daily life.
Search by Social Security number if you have it from another source. This guarantees a unique match.

ActualPeopleSearch incorporates public record data that can complement SSDI searches, helping you verify identities and locate additional records for individuals you find in the index.

Using SSDI Results for Further Research

Ordering the SS-5 Application

The most valuable follow-up to an SSDI entry is requesting the original SS-5 form, the application the person filed when applying for a Social Security number. The SS-5 can contain:

Full name at the time of application
Date and place of birth
Father's full name
Mother's full maiden name
Employer's name and address
The applicant's signature

This information is especially valuable because the mother's maiden name on an SS-5 may be the only place you find it recorded.

How to Request an SS-5

Identify the person in the SSDI and confirm they are deceased
Submit a request to the SSA using Form SSA-711 or a written letter
Pay the applicable fee (currently under twenty dollars for a deceased person's record)
Wait for processing, which typically takes several weeks

Connecting to Death Certificates

The SSDI entry tells you the state and approximate location of the person's death. Use this information to order a death certificate from the appropriate state vital records office.

Connecting to Other Records

An SSDI entry provides confirmed dates and locations that can guide searches in:

Census records (knowing the exact birth year helps locate the right person)
City directories (knowing the zip code narrows the geographic search)
Obituary databases (knowing the exact death date pinpoints the newspaper issue)

Recent Changes to SSDI Access

In 2011, the SSA began removing records of recent deaths from the public SSDI in response to identity theft concerns. This means that:

Deaths within the past few years may not appear in publicly searchable databases
Access to the full file is available only to certain government agencies and approved entities
Genealogists may need to use alternative sources for recent deaths

The SSDI as Part of a Larger Strategy

The Social Security Death Index is a starting point, not an endpoint. It tells you that a person existed, when they were born, and when they died. Those confirmed facts then lead you to death certificates, obituaries, cemetery records, and the SS-5 application, each of which adds more detail to your family history.

Think of the SSDI as a reliable directory that points you toward richer, more detailed records. When combined with tools like ActualPeopleSearch, it becomes part of a comprehensive research strategy that connects confirmed identities to the full range of available public records.