What the Social Security Death Index is and where to find it

The Social Security Death Index (SSDI) is a public record compiled by the Social Security Administration that lists people whose deaths were reported to Social Security. It contains the name, Social Security number, date of birth, date of death, and last known ZIP code for millions of deceased individuals. The index is not a complete record of all deaths in the United States — it only includes people whose deaths were reported to Social Security, which typically happens when someone claims a survivor benefit or when a family member notifies the agency.

You can search the SSDI for free through several sources. The Social Security Administration itself does not operate a public search tool on its website, but the index data is publicly available and hosted by third-party genealogy sites. The most widely used free options are FamilySearch.org (run by The Church of Jesus Christ of Latter-day Saints), Ancestry.com's free tier, and the Social Security Administration's own downloadable database files. Each source works slightly differently, and the search results you get may vary depending on how the data was indexed.

Key Takeaways

  • The Social Security Death Index contains death records reported to Social Security, not all deaths in the United States, and includes name, Social Security number, birth date, death date, and last known ZIP code.
  • FamilySearch.org and Ancestry.com offer free SSDI searches without requiring a paid subscription or account.
  • Search results work best when you enter a full name and approximate year of death, because partial names or common names may return hundreds of results.
  • The index is typically updated monthly, so very recent deaths may not appear immediately.
  • A record in the SSDI does not prove identity or confirm details — it is a government record that can be used as a starting point for further research.

How to search FamilySearch.org for free

FamilySearch.org is one of the largest free genealogy databases and includes the full Social Security Death Index. Go to FamilySearch.org and click on "Search" at the top of the page. Select "Death Records" from the dropdown menu, or search directly in the main search box. Enter the person's first and last name in the name fields. If you know the year of death or the state where they died, enter that information — it will narrow your results significantly.

Click "Search" and review the results. Each record shows the person's name, Social Security number (usually with the last four digits visible), date of birth, date of death, and last known ZIP code. You do not need to create an account to search, though creating a free account lets you save results and build a family tree. If you get too many results, add more details like the state or a narrower date range and search again.

How to search Ancestry.com without paying

Ancestry.com includes the Social Security Death Index in its free search tier. Visit Ancestry.com and look for the "Search" option. You can search the SSDI without a subscription, though you will need to create a free account. Enter the person's name and any other details you know — birth year, death year, or location. Ancestry's search engine will return results from the SSDI along with other records that may be available.

The free tier shows you the record summary and basic information. If you want to see additional details or linked records, Ancestry may prompt you to upgrade to a paid subscription, but the core SSDI information is visible without paying. Like FamilySearch, you can refine your search by adding more details if you get too many results.

Downloading the raw data directly from Social Security

The Social Security Administration publishes the raw SSDI data as downloadable files on its website. This option is best if you want to search a large number of names or prefer working with the data in a spreadsheet. Visit the Social Security Administration's public data page and look for the SSDI download files. The files are organized by year and are available in text format.

Downloading and searching these files requires some technical skill — you will need to extract the files and search them using a spreadsheet program or database tool. This method is free but takes more time and effort than using a website search. Most people find the FamilySearch or Ancestry search tools faster and easier.

What information appears in a record and what it means

A typical SSDI record shows five pieces of information: the person's full name as it appears in Social Security records, their nine-digit Social Security number (often partially masked), date of birth, date of death, and the last known ZIP code on file. The record does not include cause of death, location of death, or family information. The last known ZIP code is the address Social Security had on record at the time the death was reported — it may not be where the person actually died or where they lived most recently.

The date of death in the SSDI is when Social Security was notified of the death, not necessarily the actual date the person died. There can be a delay of weeks or months between the death and the report to Social Security. For this reason, if you are searching for someone who died very recently, they may not yet appear in the index.

Why someone might not appear in the Social Security Death Index

The SSDI is not a complete record of all deaths in the United States. A person may not appear in the index for several reasons: their death was never reported to Social Security, they did not have a Social Security number, they died before Social Security began keeping electronic records (roughly the 1960s), or the death was reported under a different name than the one you are searching. Immigrants who died before becoming U.S. citizens, people who worked under the table, and those who died in institutions that did not report to Social Security may not be listed.

If you cannot find someone in the SSDI, try searching with alternate names, nicknames, or maiden names. You can also search state vital records, newspaper archives, or cemetery records as alternatives. The SSDI is a useful starting point but should not be your only source when researching a death.

How current is the Social Security Death Index

The Social Security Death Index is updated monthly, typically in the middle of the month. Deaths reported to Social Security in the previous month appear in the next update. This means there is usually a lag of four to eight weeks between when someone dies and when they appear in the index. Very recent deaths will not show up immediately, so if you are searching for someone who died within the last month or two, they may not yet be listed.

The exact update schedule can vary, and delays sometimes occur. If you are searching for a recent death and do not find a record, check back in a few weeks. The websites that host the SSDI (like FamilySearch and Ancestry) may update on slightly different schedules, so you might find a record on one site before another.

Frequently Asked Questions

Can I search the Social Security Death Index by Social Security number?

Most free search tools require you to enter a name first. If you have only a Social Security number and no name, FamilySearch and Ancestry will not let you search by number alone. The Social Security Administration's downloadable files can be searched by number if you have the technical skill to work with the raw data, but this is not practical for most people.

Is the information in the Social Security Death Index accurate?

The SSDI contains the information Social Security received, which is usually accurate but not always. Names may be misspelled, dates may be wrong, or information may be incomplete. A record in the SSDI should be treated as a lead for further research, not as proof. If you need to verify a death for legal or financial reasons, contact the vital records office in the state where the person died.

Can I use the Social Security Death Index to find someone's Social Security number?

Yes, the SSDI includes Social Security numbers, though most search results show only the last four digits for privacy. If you need a full Social Security number for genealogy research, you can usually see it in the detailed record view. Using someone's Social Security number for any purpose other than genealogy or historical research is illegal.

What should I do if I find an error in a Social Security Death Index record?

Contact the Social Security Administration directly to report an error. You can call 1-800-772-1213 or visit your local Social Security office in person. Provide the person's name, Social Security number, and the specific information you believe is wrong. Social Security can correct records in their system, though it may take time for the correction to appear in the public index.

Is there a charge to search the Social Security Death Index?

No. The Social Security Death Index is public data and all the search tools mentioned here — FamilySearch, Ancestry's free tier, and the Social Security Administration's downloadable files — are free to use. Some genealogy websites may charge for premium features or additional records, but the basic SSDI search is always free.