Yes, you can legally have two last names in the U.S. There is no federal law against it, and every state offers a path. Which path fits depends on your circumstances: marriage, a court order, or in some states, consistently using the new name over time. Hyphenated (Smith-Jones), spaced (Smith Jones), or blended into a single new surname, the choice is yours.
Adopting Two Last Names Through Marriage
Marriage is the simplest route. When you fill out your marriage license, you can take your spouse’s last name, hyphenate yours with theirs, use both without a hyphen, or combine parts of each into something new. You can also keep your original name. The marriage certificate then serves as legal proof, and you use it to update your ID afterward.
One limit worth knowing: the name you choose on a marriage license generally has to derive from the current or former names of you or your spouse. You can’t use a marriage certificate to adopt a completely unrelated surname. For that, you need a court order.
Changing Your Name Through a Court Order
Outside of marriage, anyone can petition a court to adopt two last names, and the reason doesn’t have to be dramatic. Personal preference is enough in most jurisdictions. The typical process: file a petition with your local court, publish notice of the proposed change in a local newspaper (required in many states), wait out any mandatory period, and attend a hearing. If the judge finds no sign of fraud or evasion, they sign an order making the new name official.1USAGov. How to Change Your Name and What Government Agencies to Notify
Timelines vary. Some states impose waiting periods of a few weeks between filing and the hearing, and busy courts take longer to schedule. Plan for one to three months from start to finish, though straightforward petitions in smaller courts can move faster.
What It Costs
Filing fees for a name change petition span a wide range. Some states charge as little as $25 to $60. Others run $400 or more. Newspaper publication, where required, adds roughly $30 to $200. Most courts offer fee waivers if your household income falls below a set threshold or you receive public benefits like food assistance or Medicaid.
When a Judge Can Deny It
Judges have discretion to deny a petition they see as motivated by fraud, an attempt to duck debts or judgments, or an effort to evade law enforcement. A criminal record isn’t an automatic bar, but it can complicate the review. More than a dozen states require fingerprinting or a background check as part of the petition, and several prohibit registered sex offenders from changing their names at all.
Safety-Based Publication Waivers
If publishing your name change in a newspaper would put you at risk, many states let you ask the court to waive or seal the publication requirement. The exception exists mainly for survivors of domestic violence, stalking, and similar threats. You’ll typically need to explain the safety concern to the judge, and some states require documentation such as a protective order.
Common-Law Name Changes
A number of states recognize what’s called a common-law name change: you simply start using your new name consistently in daily life, without any filing, hearing, or fee. The State Department accepts this method for passport purposes if you can show exclusive use of the new name for at least five years through documents like tax records, employment records, or a driver’s license.2Department of State. 8 FAM 403.1 Name Usage and Name Changes
The catch: many institutions won’t accept a name change by usage alone. Banks, the Social Security Administration, and state DMVs often want to see a court order or marriage certificate. Most people who want two last names on all their official documents find a court petition or marriage certificate easier, even when the informal route is technically available.
Giving a Child Two Last Names at Birth
Parents can give a child two last names at birth, hyphenated or as separate words, by writing them on the birth certificate. Most states allow this with no extra steps beyond the standard paperwork.
Watch the state’s rules on character limits and symbols. Some cap surnames at 40 characters per field; others allow well over 100. Numerals and special symbols are usually prohibited, though hyphens, apostrophes, and spaces are generally accepted. Hawaii and Alaska also permit diacritical marks from indigenous languages. If you’re planning a long combined surname, check with your state’s vital records office before the birth.
How Two Last Names Appear on Official Documents
Government systems weren’t uniformly designed with compound surnames in mind. Each agency has its own formatting rules, so your name may look slightly different on each document.
Social Security Card
The Social Security card allows up to 26 characters for the last name and suffix combined. SSA won’t shorten your name unless it exceeds that limit, so most hyphenated or two-part surnames fit without trouble.3Social Security. How the Number Holder’s Name is Shown on SSN Card
U.S. Passport
Passports print names in all capital letters following international aviation standards, so multi-part surnames can look like one long word if spaces disappear. The State Department will preserve hyphens and spaces based on your preference and the evidence you submit. If your previous passport or birth certificate shows a space between two last names, the new passport should match. You can request a hyphen be added or removed.2Department of State. 8 FAM 403.1 Name Usage and Name Changes
Driver’s License and State ID
State DMV systems vary. Some will truncate a name that exceeds their character limits, creating a mismatch with your other documents. If your combined surname runs long, confirm with your state’s motor vehicle office how it will appear before the card is printed.
Updating Records After the Change
Once you have the legal paperwork in hand, update your identity documents in a specific order. Getting the sequence wrong is where most people create avoidable problems.
Social Security First
Update your name with the Social Security Administration before anything else. The IRS, state DMV offices, and other agencies verify identity against SSA records. If your name doesn’t match SSA’s file, applications and filings elsewhere will bounce.1USAGov. How to Change Your Name and What Government Agencies to Notify You can start by calling SSA at 1-800-772-1213 or visiting a local office. Bring your court order or marriage certificate along with proof of identity like a passport or driver’s license.4Social Security Administration. Change Name with Social Security
Then Everything Else
Once SSA has your new name, work through the rest: driver’s license, passport, bank accounts, employer records, insurance policies, voter registration, and any professional licenses. Each agency has its own process, but your marriage certificate or court order is the universal proof document.
Form I-9 at Work
When you update your name with an employer, you’ll complete a new Form I-9. The federal instructions are explicit: employees with two last names must include both names in the Last Name field, and hyphens and apostrophes should be preserved. Prior last names go in the “Other Last Names Used” field.5U.S. Citizenship and Immigration Services. Completing Section 1 – Employee Information and Attestation
Tax Returns
The name on your tax return must match SSA’s records. If it doesn’t, the IRS will reject an e-filed return.6Internal Revenue Service. Age, Name or SSN Rejects, Errors, Correction Procedures Update SSA well before tax season and the problem never arises.
Credit Reports
This is where two-last-name changes cause the most surprising trouble. Credit bureaus match incoming data to your file largely by name. After a change, some creditors may start reporting under the new name while your existing file still carries the old one. The bureau can read this as a different person and open a second, empty credit file. The result is a fragmented history that can drop your score and make it harder to get approved for a mortgage, auto loan, or rental. After updating your name, pull your reports from all three bureaus and confirm your history followed you. If it didn’t, file a dispute to merge the files.
Keeping the Formatting Consistent
The hardest part of having two last names isn’t getting them. It’s keeping them formatted the same way across every system that stores your identity. A hyphen on your Social Security card but a space on your driver’s license can trigger verification failures. A truncated surname on a state ID that doesn’t match your passport can cause delays at airport security. Decide up front exactly how you want the name formatted, and push that exact version through every document update. The half hour spent getting it right at the start will save hours of corrections later.