No special conditions.
One generation apart, half the shared DNA of first cousins.
Allowed in Alabama and every other US state.
Neighboring states.
Cousin marriage laws change at the state line. Here's how Alabama's neighbors handle first cousins.
| State | First cousins | Details |
|---|---|---|
| Mississippi | Banned | |
| Tennessee | Banned | Banned in 2024. |
| Georgia | Legal | |
| Florida | Legal | A 2026 bill to ban it did not pass. |
See all 50 states on the cousin marriage map. Laws change, so confirm with your county clerk before you plan anything.
Legal is one question. Genetics is another.
Children of first cousins have roughly a 5 to 6% chance of a serious birth defect, compared with about 3% for unrelated parents. For second cousins, the extra risk is under one percentage point.
The risk comes from recessive conditions. Cousins are more likely to carry the same hidden variant from a shared grandparent. A carrier screen tells you whether you two actually do. If you don't, most of the extra risk goes away.
Not sure exactly how you're related? The cousin calculator names any relationship, and a DNA comparison settles it for good.
Cousins? Check your carriers.
The single most useful test a related couple can take before kids. One couple result, with a genetic counselor included.
Alabama cousin questions.
Can you marry your first cousin in Alabama?
Yes. Alabama has no special rules for cousins. First cousins apply for a marriage license like any other couple.
Can you marry your second cousin in Alabama?
Yes. Second cousins can legally marry in Alabama, as in every US state.
Can you marry your first cousin once removed in Alabama?
Yes. If first cousins can marry in Alabama, so can first cousins once removed.
Is it legal to date your cousin in Alabama?
Dating isn't regulated, but marriage and incest laws can apply to close relatives. In Alabama, first cousins can legally marry. Second cousins and beyond are fine.