Have you ever wondered about the rules of who you can marry? It might sound strange, but some people ask, “Can I marry my cousin?”
In the United States, the answer isn’t as simple as yes or no. Let’s dive into this interesting topic together!
What Does “Cousin” Mean?
First things first, let’s understand what a cousin is. Your cousin is the child of your aunt or uncle. That makes them your first cousin. You share grandparents with them.
There are also second cousins, who are the children of your parents’ cousins. They share great-grandparents with you.
A Peek into History
Long ago, it wasn’t unusual for cousins to get married. In many royal families, cousins married to keep the bloodline strong. Even famous people like Albert Einstein and Charles Darwin married their cousins!
But over time, people began to worry about the health of children born to closely related parents. They thought marrying cousins might not be a good idea.

The Science Behind It
When close relatives have children, there’s a higher chance that the kids might have genetic problems. This is because they might both carry the same genes for certain diseases. But the risk isn’t as high as many people think.
Scientists say that the chance of having a child with a genetic problem if cousins marry is about 4-7%. For unrelated couples, it’s about 2-3%. So, while the risk is higher, it’s not super high.
What Do the Laws Say?
In the United States, each state has its own rules about cousin marriage. Let’s explore!
States Where It’s Legal
In some states, it’s totally legal to marry your first cousin. These states include:
- Alabama
- California
- Colorado
- Florida
- Georgia
- Hawaii
- Maryland
- Massachusetts
- New Jersey
- New Mexico
- New York
- Rhode Island
- South Carolina
- Tennessee
- Vermont
- Virginia
States with Conditions
Some states allow cousin marriage but have special rules. For example:
- Arizona: You can marry your cousin if one of you can’t have children.
- Illinois: Cousin marriage is allowed if both people are over 50 or can’t have kids.
- Maine: You need genetic counseling before you can marry your cousin.

States Where It’s Not Allowed
In other states, marrying your first cousin is not allowed. These states include:
- Arkansas
- Delaware
- Idaho
- Iowa
- Kentucky
- Louisiana
- Michigan
- Mississippi
- Montana
- Nevada
- New Hampshire
- North Dakota
- Ohio
- Oklahoma
- Oregon
- Pennsylvania
- South Dakota
- Texas
- Washington
- West Virginia
- Wyoming
What About Second Cousins?
Good news! In all states, it’s legal to marry your second cousin. Since you’re less closely related, the laws don’t have a problem with it.
Why Do Laws Differ?
You might wonder why some states allow cousin marriage while others don’t. This goes back to history, culture, and beliefs.
- Health Concerns: Some states banned cousin marriage because they worried about the health of future children.
- Cultural Differences: In some cultures, cousin marriage is common and accepted.
- Changing Times: Laws can change over time as people learn more and ideas shift.
Fun Facts!
- Presidential Cousins: Did you know that Franklin D. Roosevelt married his fifth cousin, Eleanor Roosevelt?
- State Surprises: In some states where cousin marriage is illegal, it’s still legal to marry your step-sibling!

What Do People Think?
Opinions about cousin marriage vary. Some people think it’s okay, while others feel uncomfortable about it. This often depends on cultural background, personal beliefs, and what people are used to.
If You’re Thinking About Marrying Your Cousin
If someone is considering marrying their cousin, here are some things to keep in mind:
- Check the Laws: Make sure to find out what the laws are in your state.
- Health Considerations: It might be a good idea to talk to a doctor or genetic counselor.
- Family Reactions: Think about how your family and friends might feel.
The Bigger Picture
At the end of the day, marriage laws are there to help protect people. As we learn more about genetics and health, our understanding of cousin marriage changes.
Wrapping It Up
So, is it legal to marry your cousin in the USA? It depends on where you live! Some states say yes, some say no, and others have special rules.
Remember, laws are made to keep us safe and happy. It’s always important to respect them and make informed decisions.
Glossary
- Genetic Counselor: A healthcare professional who helps people understand how genetics might affect their health.
- Genetic Problems: Health issues that are passed down from parents to children through genes.
Quick Quiz!
- True or False: It’s legal to marry your second cousin in all US states.
- Name one state where it’s legal to marry your first cousin.
- Why did some states ban cousin marriage?
Answers:
- True
- Answers may vary (e.g., California, New York)
- Because of health concerns about genetic problems in children.
Final Thoughts on Marrying Your Cousin
Laws can be tricky, but learning about them doesn’t have to be boring! Always stay curious and keep asking questions. Who knows what interesting facts you’ll discover next?
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