So, when did social security numbers start? The first Social Security numbers were issued in November 1936. They arrived one year after President Roosevelt signed the Social Security Act of 1935.
The numbers were created to track workers’ earnings for benefits. Today, the SSN is the most important ID number in American life. This guide covers the full timeline.
📋 In This Guide
The Origin: 1935–1936
The Social Security Act became law on August 14, 1935. The government then needed a way to track every worker’s wages. The answer was a unique nine-digit number for each person.
Registration began in November 1936 through local post offices. More than 30 million applications flooded in within months. It was one of the largest record-keeping projects in history.
💡 Tip: The lowest number, 001-01-0001, went to Grace D. Owen of Concord, New Hampshire. John D. Sweeney Jr. of New York is often credited with the first processed record.
SSN Timeline: Key Milestones
| Year | Milestone |
|---|---|
| 1935 | Social Security Act signed by President Franklin D. Roosevelt |
| 1936 | First SSNs issued; registration via 45,000+ post offices |
| 1937 | First payroll taxes collected; wage base set at $3,000 |
| 1961 | IRS begins using SSNs as taxpayer ID numbers |
| 1972 | SSA starts issuing numbers centrally from Baltimore |
| 1987 | Newborns can get SSNs at birth (Enumeration at Birth) |
| 2011 | Randomization ends geographic meaning of first 3 digits |
| 2025–26 | Paper benefit checks end; payments go fully electronic |
How SSN Numbers Were Structured
Until 2011, the nine digits had real meaning. The format told you where and when a number was issued.
| Segment | Name | Original Meaning |
|---|---|---|
| First 3 digits | Area Number | State or region where issued |
| Middle 2 digits | Group Number | Internal batch ordering |
| Last 4 digits | Serial Number | Sequential 0001–9999 |
Why Randomization Happened in 2011
Predictable numbers helped identity thieves. Researchers showed SSNs could be guessed from birth data. So the SSA randomized all new assignments from June 25, 2011.
Need a card today? See our guide on how to request a new Social Security card. Lost yours? Here is how to replace a Social Security card for free.
Frequently Asked Questions
When did Social Security numbers start being issued?
November 1936, about one year after the Social Security Act of 1935 was signed.
Who received the first Social Security number?
Grace D. Owen held the lowest number (001-01-0001). John D. Sweeney Jr. had the first processed record.
Did SSNs always identify your state?
Yes, until June 2011. The first three digits showed the issuing state before randomization.
