Yes, you can marry someone with the same last name anywhere in the United States, and the marriage license process is exactly the same as it is for any other couple. Sharing a surname is not evidence of a family relationship, and no clerk will deny your application because your last names match. The one real difference comes after the wedding: you skip the name-change paperwork that most newlyweds spend weeks working through.
Sharing a Surname Is Not a Legal Problem
The worry that pushes most people to search this question is whether a shared last name will look like a family connection. It won’t. Thousands of unrelated people share common surnames like Smith, Johnson, Garcia, and Kim, and no state treats a matching surname as evidence that two applicants are related.
Every state does prohibit marriage between close relatives. The categories typically include parents and children, siblings, and in some states first cousins. Those bans rely on the actual family relationship, not on names. Most marriage license applications ask both applicants to confirm they are not closely related, and as long as that answer is truthful, a matching surname is legally irrelevant.
The Marriage License Works the Same Way
Applying for a marriage license is identical to any other couple’s experience. You both provide identification, pay the license fee, and sign the application. The clerk records each applicant’s full legal name, so the license distinguishes the two of you by your first and middle names even though the last names match.
The marriage certificate you receive after the ceremony reflects whatever names you listed on the application. If neither of you is changing anything, the certificate simply shows two people with the same surname getting married. It’s still the document you’ll rely on to prove the marriage happened whenever a government agency, insurer, or bank needs to see it.
What You Skip: The Name-Change Chain
For most newlyweds, updating a last name is the tedious part of getting married. It means a new Social Security card, a new driver’s license, an updated passport, revised bank accounts, and hours on hold with everyone else who holds a record on you. Each step has its own forms and wait times, and they generally have to happen in a specific order: certified marriage certificate first, then Social Security, then state ID, then the rest.
When you already share your spouse’s surname, none of that applies. Your existing identification, financial accounts, and professional credentials stay accurate without any changes. It’s genuinely one of the practical upsides of the situation.
What You Still Need to Update
Even when your name stays the same, the marriage itself changes your legal status, and a few agencies need to know.
Social Security Administration
The SSA asks you to report life changes, including marriage, separately from any name change.1Social Security Administration. Communicate Changes to Personal Situation If your name hasn’t changed, you don’t need a replacement card. But if you receive Social Security benefits, SSI, or Medicare, reporting the marriage matters, because benefit amounts and eligibility can shift with household income and marital status. If you later decide to change your name for any reason, replacement Social Security cards are free.2Social Security Administration. Replace Social Security Card
Tax Filing
Filing a joint return is actually easier when both spouses already share a last name. The IRS matches the name on your return to the name on file with the Social Security Administration, and mismatches can delay refunds. That’s a common headache for a spouse who recently changed names and hasn’t updated their SSA record yet. It won’t be an issue for you. You can elect married filing jointly status without changing anything about your name.3Internal Revenue Service. Name Changes and Social Security Number Matching Issues
Health Insurance
Marriage is a qualifying life event that lets you add a spouse to your employer-sponsored health insurance outside of open enrollment. The matching surname doesn’t change what the insurer wants to see. Expect to submit a copy of your marriage certificate and possibly your spouse’s ID when enrolling them as a dependent.
If You Later Want a New Shared Name
Some couples who already share a surname decide they’d rather have something new: a grandparent’s maiden name, a combination of elements, or simply a name that feels like theirs. How you get there depends on how different the new name is from what’s on your marriage certificate.
The Marriage Certificate Route Doesn’t Help
In most states, a marriage certificate lets you adopt your spouse’s surname without going to court.4USAGov. How to Change Your Name and What Government Agencies to Notify When you already have the same last name, that pathway doesn’t accomplish anything, because there’s no new name to adopt. It exists for spouses taking each other’s existing name, not for inventing a new one.
Court-Ordered Name Change
If you want a name genuinely different from your current shared surname, you’ll file a name change petition with your local court.4USAGov. How to Change Your Name and What Government Agencies to Notify That’s a separate legal process from getting married. The typical steps include filing a petition that states your current legal name and the name you want, sometimes publishing notice of the change in a local newspaper, undergoing a background check, and appearing before a judge who approves or denies the request. Filing fees vary widely by county, generally somewhere between $25 and $500.
Both spouses can file if you both want the new name. Each of you files individually and pays your own fee. Once a judge signs the order, you’ll take the certified court order to the Social Security Administration, your state’s motor vehicle agency, your bank, and everywhere else that holds your records. At that point you’re doing the standard name-change work that you skipped at the wedding.
Small Daily Annoyances to Expect
The legal side is straightforward. Daily life throws a few minor curveballs.
Mail is the most common one. Letters addressed to “Mr. and Mrs. Johnson” or “The Johnson Family” don’t tell you which spouse the sender intended. Bills, medical notices, and legal correspondence can pile up with no obvious recipient. Using full first names on accounts and asking doctors’ offices, banks, and other important contacts to address correspondence to a specific person clears up most of the confusion.
Shared accounts at banks, utilities, and online services sometimes default to displaying just a last name, which makes it harder for customer service to pull up the right person when both account holders are “Johnson.” Separate logins and distinct email addresses tied to each first name help. At medical offices and restaurants, giving your first name rather than your last avoids the moment where two people stand up when one name is called.
Choosing a Surname for Your Children
When both parents already share a surname, giving your child that same name is the most natural choice and the one most couples make. It keeps a single family name across generations with no extra paperwork.
If you want something different for the child, the options depend on where you live. State laws on children’s surnames vary a lot. Some states let parents choose virtually any surname. Others limit the options to a parent’s legal surname or a hyphenated combination of both parents’ names, and a few have specific rules about which parent’s name takes priority if the parents can’t agree. Check with your local vital records office before assuming you can pick any name you want. If you want a surname for your child that differs entirely from your own shared name, you’ll likely need a court-ordered name change after the birth, since the birth certificate in most states must reflect a parent’s legal surname.