Social Security Death Index (SSDI): How to Search It Free

You can search the Social Security Death Index free at FamilySearch.org (with a free account) and through Steve Morse's One-Step tools at stevemorse.org. The SSDI is a database of more than 90 million deaths reported to the Social Security Administration, and it's strongest for deaths from 1962 through early 2014 — the year the publicly available file stopped being updated for genealogy sites.

For 20th-century American research, the SSDI is often the fastest way to turn a vague "Grandpa's brother died sometime in the eighties" into an exact death date and a last-known ZIP code. And once you've confirmed the death, the follow-up record — the SS-5 application — names that person's parents, which is exactly the kind of link you can drop into the free family relationship calculator at CousinChart to work out how their descendants connect to you.

What the Social Security Death Index actually is

The SSDI is an index extracted from the Social Security Administration's Death Master File — the running list of deaths reported to the SSA so benefit payments could stop. It is not a death certificate collection. A typical entry gives you:

• Full name (as it appeared in SSA records at death)
• Social Security number and the state where it was issued
• Birth date
• Death date (month and year only for many pre-1988 entries; exact dates are common afterward)
• Last residence, usually as a ZIP code
• Sometimes a separate ZIP where a final lump-sum benefit was sent

That's a compact record, but every field works hard. The birth date confirms you have the right person. The state of issuance hints where they lived as a young worker. The last-residence ZIP tells you where to hunt for an obituary, a cemetery, and a death certificate.

Why the SSDI starts (mostly) in 1962

Social Security numbers were first issued in 1936, but the SSA didn't computerize death reporting until 1962. Deaths before then were rarely added to the electronic file, so a grandmother who died in 1954 is probably absent even though she had a number and paid in for years. A scattering of pre-1962 deaths did make it in — but treat anything before 1962 as a lucky bonus, not an expectation.

There's a cutoff at the other end too. Under a 2013 federal law, deaths from the most recent three years are held in a limited-access file, and the genealogy websites' public copies of the SSDI effectively stopped updating in early 2014. For a death in 2019, you're better off with free death records, newspaper obituaries, and Find a Grave.

Where to search the SSDI free

Several sites host copies of the same underlying file. The free ones:

Start at FamilySearch: search the collection called "United States Social Security Death Index" with a name and an approximate birth year. If the name is common, switch to Steve Morse's One-Step form, which lets you combine a birth month, a death-year range, and a last-residence ZIP in a single query — usually enough to isolate one John Sullivan out of hundreds.

Reading an SSDI entry like a genealogist

Say you find: Mary Kowalski, SSN issued Illinois, born 4 Mar 1911, died Jun 1985, last residence 60629 (Chicago, IL). Here's what each clue does:

1. Issuing state (Illinois). Before 1972, numbers were issued by local offices, so the state usually reflects where the person lived when they applied — often as a young worker in the late 1930s or 1940s. After 1972, the number reflects the mailing address on the application instead.
2. Death month and year. Enough to order the state death certificate and to target a newspaper obituary search to a few weeks of issues.
3. Last-residence ZIP. Converts to a town. That town's cemeteries, funeral homes, and probate court become your next stops.

One warning: the SSDI proves a death was reported, not every detail around it. Birth dates in particular repeat whatever the person put on their application decades earlier — check them against the census and birth records before carving anything in stone.

The SS-5: the record behind the index

The real prize sits one step past the index. Everyone who got a Social Security number filled out Form SS-5, the application — and it asked for full name, birth date and place, both parents' full names (including the mother's maiden name), plus the applicant's address and employer at the time.

For Americans born in the 1870s–1910s, the SS-5 is frequently the only surviving document where they personally stated their parents' names. You can request a copy of a deceased person's SS-5 from the Social Security Administration for a fee (about $30); having the SSN from the SSDI speeds the request along. That mother's maiden name routinely smashes brick walls — and once it hands you a new family line, the CousinChart calculator will tell you what the people on it are to you, whether that's a great-great-aunt or a second cousin twice removed.

The free alternative: NARA's Numident release

Before paying, check the free route. The National Archives received the SSA's Numident records — the electronic abstracts of applications for people who died, covering applications filed from 1936 to 2007 — and made them searchable through its online Access to Archival Databases (AAD) system. For many people, the Numident entry includes the parents' names from the SS-5 at no cost. It's an abstract rather than an image of the original form, but when it lists "Mother: Bronisława Nowak," you've got your answer free.

When someone is missing from the SSDI

Absence from the index is common and rarely mysterious. The usual reasons:

• They died before 1962 — the biggest cause by far.
• No survivor filed for benefits and the death was never reported to the SSA, more common for early deaths.
• They worked for the railroad. Railroad employees paid into the separate Railroad Retirement system; the RRB holds their records and answers genealogy requests for a fee.
• They never had a number — homemakers who never worked outside the home, some farm and domestic workers before the 1950s coverage expansions, and members of some religious groups.
• The name is recorded differently — women under a later married name, immigrants under an Americanized spelling, or a first and middle name swapped.

Work the alternatives: state death indexes on FamilySearch, free death records, obituaries, and cemetery databases. Between them, almost every 20th-century American death leaves a trail.

A quick SSDI workflow you can copy

1. Estimate a birth year from the census.
2. Search FamilySearch's SSDI collection; switch to Steve Morse One-Step if the name floods you with matches.
3. Note the death month/year, SSN, and last-residence ZIP.
4. Pull the obituary and the Find a Grave memorial for that town and month.
5. Check NARA's AAD Numident data for parents' names; order the SS-5 if you need the full original.
6. Feed each newly named relative into the relationship calculator to see exactly where they sit on your tree.

FAQ

Is the Social Security Death Index free to search?

Yes. FamilySearch hosts it free with a free account, and Steve Morse's One-Step site offers a free, more flexible search of the same data. Subscription sites carry identical entries, so there's no need to pay just to search the index.

How current is the SSDI?

The public copies genealogy sites use effectively end in early 2014, and a federal rule keeps the most recent three years of deaths out of the public file. For recent deaths, use obituaries, Find a Grave, and state death indexes instead.

Why can't I find my grandmother who died in 1958?

The SSA didn't computerize death reporting until 1962, so most earlier deaths never entered the electronic file. Her death certificate, a state death index, and a newspaper obituary are the right records for that era.

What is the SS-5 and why do genealogists order it?

The SS-5 is the original application for a Social Security number. It lists the applicant's birth date and place and both parents' full names — including the mother's maiden name — making it one of the best parent-proving documents for people born before statewide birth registration.

Does the SSDI show cause of death?

No. It only confirms the death was reported, with dates and a last-residence ZIP. For cause of death you need the state or county death certificate.

Can a living person appear in the SSDI?

It happens — clerical errors put a small number of living people in the Death Master File. Treat an unexpected entry as a lead to verify, not proof on its own.

From one index entry to a whole branch

The SSDI is a doorway record: thirty seconds of free searching yields a death date, a place, and a Social Security number, and those three facts unlock the obituary, the death certificate, and the SS-5 with its parents' names. Every one of those documents names more relatives. When they do, run each connection through the free CousinChart relationship calculator — it turns "my grandfather's sister's grandson" into a plain answer you can write on the tree.