Haplogroup U5
U5 is the maternal lineage of Europe's Ice Age hunter-gatherers — the oldest major mtDNA branch native to the continent, still carried by about one European in ten. Explore the branch in the full mtDNA haplotree — sub-branches, defining variants and where its testers live. Free, no account needed.
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Origin and distribution of U5
U5 is as close as mitochondrial DNA comes to an indigenous European lineage. It arose on the continent tens of thousands of years ago, and in ancient DNA it is the overwhelming signature of Europe's Mesolithic hunter-gatherers — in many pre-farming burials, nearly every individual carries U5 or its sisters. When Neolithic farmers arrived with different maternal lines, U5 survived alongside them; today roughly one European in ten carries it.
Its two halves kept distinct geographies: U5b is strongest in western and southern Europe (with a striking concentration among the Sámi, where U5b1b arrived by a northern route), while U5a leans east, common from the Baltic across Russia. For anyone whose result comes back U5, the honest headline is deep time — a maternal line that watched the glaciers leave.
One line among many: your mtDNA haplogroup traces a single maternal line — mother to mother into deep time — so it is a thread of ancestry, not an ethnicity and not a percentage of who you are. Two people in the same branch share a foremother; the rest of their genomes are their own story.
Frequently asked questions
What is haplogroup U5?
U5 is the maternal lineage of Europe's Ice Age hunter-gatherers — the oldest major mtDNA branch native to the continent, still carried by about one European in ten. It is a branch of the mtDNA tree: everyone in it inherits the same set of defining mutations from one shared foremother.
How do I find out if I belong to U5?
If you have already tested with a consumer DNA company, the free mtDNA Haplogroup Finder reads a raw DNA export and places you on the tree at the resolution your file supports — free, and the file is discarded after analysis. A dedicated mtDNA sequencing test resolves deeper branches than a genotyping chip can.
Does belonging to U5 make me related to one people?
No. A haplogroup follows a single maternal line — one ancestor per generation — while the rest of your ancestry doubles every generation back. It is a deep-time thread, not an ethnicity, and two members of the same branch can otherwise be as genetically different as any two strangers.
What does this page's tree data show?
The live browser below shows the branch inside the full mtDNA haplotree of tested lineages — its sub-branches, the variants that define them, and the countries its testers report. Counts reflect people who have taken a mtDNA test and shared an origin, so they describe the tested world, not ancient frequencies.
Keep exploring
Don't know your haplogroup yet? The free mtDNA Haplogroup Finder reads it from a raw DNA export. Or browse the whole tree in the mtDNA Haplotree. Other major branches: