The registration number on a birth certificate is printed near the top of the document, usually in the upper-right corner, and may be labeled “File Number,” “State File Number,” “Certificate Number,” “Birth Number,” or “Local Registration Number.” On the U.S. Standard Certificate of Live Birth, which most states model their forms on, the “Birth Number” field sits at the very top of the page next to a separate “Local File No.” field. Placement varies by state, county, and year of issue, so check the bottom of the page and the reverse side if nothing stands out at the top.
How to Spot It on the Page
Scan the top of the certificate first. If you see a multi-digit number next to a heading containing the words “file,” “certificate,” “birth,” or “registration,” you’ve found it. Some states print the number down near the registrar’s signature and seal, and a few put it on the back. The label itself changes from state to state, which is why the format of the number is often a more reliable clue than the heading above it.
What the Number Looks Like
Since 1948, most states have used a uniform 11-digit format arranged as xxx-xx-xxxxxx. The three segments carry specific meaning:
- The first three digits are a birth area code identifying the state or territory of registration. California is 104, Texas is 142, New York State outside New York City is 131, and New York City has its own code, 156.
- The next two digits are the last two digits of the year the birth was filed, which is almost always the year of birth.
- The final six digits are a serial number assigned sequentially as births are processed.
A number like 142-03-012345 would mean a birth registered in Texas, filed in 2003, serial number 012345.
Not every jurisdiction follows this exactly. Pennsylvania uses a seven-digit number ending in zero, followed by a hyphen and the year of birth. Baltimore kept its own birth area code (154) until the early 1970s, and Boston does not use a birth area code at all.
Why Some Certificates Don’t Show a Number
Birth certificates come in two main versions. A long-form certificate is a full copy of the original record and includes the file number and filing date along with details like parents’ birthdates and the attending physician’s signature. A short-form certificate is an abbreviated version with basic facts: name, date of birth, place of birth. Short-form copies frequently leave the registration number off entirely.
The number also only appears on certified copies issued by a government vital records office. A certified copy carries the registrar’s signature, an official raised or multicolored seal, and is usually printed on security paper. Hospital commemorative certificates with footprints or decorative borders are keepsakes, not legal documents, and don’t carry a registration number. If your document lacks the registrar’s signature and seal, it isn’t the version an agency will accept, and it probably doesn’t have the number you’re looking for.
If You Were Born Outside the United States
A U.S. birth certificate isn’t the right document for a birth abroad to U.S. citizen parents. In that case the equivalent record is a Consular Report of Birth Abroad, Form FS-240, issued by the U.S. Department of State. The serial number on an FS-240 is printed in the upper-right corner. Replacements come from the State Department rather than a state vital records office.
Getting a Copy That Shows the Number
If your certificate is a short-form, uncertified, or a hospital keepsake, you can order a certified long-form copy from the vital records office in the state where you were born. The federal government does not issue birth certificates; each state runs its own system, and the CDC maintains a directory of every state and territory office on its “Where to Write for Vital Records” page.
In most states you fill out an application, show a valid government-issued photo ID, and pay a fee that generally runs from roughly $10 to $30 per copy. Requests can usually be made online, by mail, or in person. Online and in-person requests are typically the fastest; mail requests can take anywhere from two to twelve weeks depending on the office’s backlog.