Baby naming in the USA: trends, birth certificates and what to know
In the United States there is a great deal of freedom in choosing a name, and a lot of public data about which names families choose. Here is how it works in practice.
How a name becomes official
In most births in the United States the hospital gives parents a birth certificate worksheet, and the information is filed with the state’s vital records office. The name you write on it becomes the legal name on the certificate. Parents can usually also apply for a Social Security number for the baby through the hospital paperwork, which uses the same name. Because each state runs its own registration, rules about length, characters and corrections differ. Many states do not accept numerals or symbols. Check your state’s vital records office for details.
Changing a name later is possible but usually requires a court process, so it is worth being sure before you sign.
Where the rankings come from
The Social Security Administration publishes a yearly list of the most popular names, based on applications for Social Security numbers. For 2025 it reported Liam and Olivia at number one, and Olivia was number one for the seventh year in a row. The full top 10 is on our trending names page, with the source linked. These lists count spelling variants separately, so a name with several spellings (such as Sofia and Sophia) can look less popular than it really is.
Trends you will notice
- Short names with a soft sound, such as Mia, Leo and Ava, remain common.
- Names that began as surnames or place names, and nature names such as Hazel, Willow and Ivy, have been popular for years.
- Gender-neutral and unisex names continue to grow, particularly for middle names.
- Families from many backgrounds in the USA often choose a name that is easy to say in both languages the child will use.
Middle names, suffixes and surnames
Middle names are very common and are often used to carry a family name, a grandparent’s name or a second meaning. Naming a son after his father brings the suffixes Jr., II or III. Hyphenated or combined surnames are accepted in most states. If the parents have different surnames, decide early which the baby will use, because it affects forms for insurance, passports and school.
A short checklist
- Say the full name with the surname and check the initials.
- Search your shortlist on the Social Security ranking to see how common each name is.
- Check how the name looks in email addresses and on forms.
- Confirm spelling with your state’s vital records office before the worksheet is filed.