US Baby Naming Laws
Namekin Team
Editorial
TL;DR
A plain-English tour of US baby naming laws. The rules are set state by state, not federally, and are usually about characters and length rather than whether a name is real. Covers common restrictions, state-specific quirks like California's diacritic ban, famous refusals, and how to change a name later.
US naming laws are surprisingly patchwork. Unlike France or Germany, there is no federal list of approved names and no national registrar; each state sets its own rules via the Vital Records office that issues birth certificates. The rules are usually about characters and length, not about whether the name is 'a real name'. This guide explains what actually gets blocked, state by state, and why.
This article is a general overview, accurate to the best of our knowledge at time of writing. It is not legal advice. US naming rules are set state by state and change over time. For your specific situation, speak to a family attorney or your state's Vital Records office.
The federal picture (there isn't one)
There is no US-wide law that prohibits any specific baby name. The First Amendment is often cited as the reason courts are reluctant to block a name outright: parents have broad freedom of expression, and the state has to demonstrate a clear harm before it can intervene.
What does happen at the federal level is that certain characters cannot be encoded in the systems used by the Social Security Administration. This is a technical constraint, not a legal one, but it has the practical effect of limiting what the state-level registrars accept.
Common restrictions across states
What most state registrars block:
- Numerals (1234, 2nd, III often acceptable but not 3)
- Obscenity (explicit swear words as names)
- Names over a set character length (often 50–100 characters total across first, middle, last)
- Names containing symbols (@, #, %, &, *)
- Diacritics in some states (é, ñ, ü are blocked in California and Kansas)
- Titles (King, Queen, Judge are often blocked because they imply rank)
State-specific oddities
California does not allow diacritical marks on birth certificates, meaning names like José must be registered as Jose. This has been the subject of repeated legal challenges but remains the rule.
New Jersey is the most restrictive on obscenity and has blocked names the parents explicitly intended as provocative. Illinois has similar rules on obscenity.
Texas and Florida are among the most permissive; they focus almost entirely on the character-set constraint and will accept almost any spelling the parents choose.
Famous refusals and near-refusals
A New Jersey couple in 2008 had a child named Adolf Hitler Campbell; the name itself was not blocked, but the family later lost custody for unrelated reasons. A Tennessee judge in 2013 ordered a child named Messiah to be renamed; the order was quickly overturned on First Amendment grounds.
The US rule is roughly: the state can block a name only if it can show it will directly harm the child. That is a much higher bar than 'the name sounds odd'.
Changing a name after registration
Every state allows a legal name change. The process usually involves a court petition, a fee of $150–$500, a published notice (waived for safety reasons in some states), and a hearing. For children, the parents petition on the child's behalf. For adults, it is done in the person's own name. Most petitions are granted.
Practical advice for expecting parents
See also our guides to registering a baby name in the US and banned baby names across Europe. If your preferred name contains a diacritic, a hyphen, an apostrophe, or any character that is not A–Z or a space, check your state's Vital Records page before birth. Each state publishes its character policy, usually on the Department of Health website. Better to discover the constraint now than at the registrar's desk three days after the baby arrives.
If you are choosing an unusual or invented spelling, it almost certainly will be accepted, US registrars are far more permissive on spelling than on symbols. The main exceptions are obvious obscenity and attempted fraud (claiming to be a member of a royal or official family).
