๐ How Rare Are You in Peru?
๐ต๐ช Genetic Landscape of Peru
Peru has one of the world's highest O blood type frequencies (~70% combined), reflecting powerful Indigenous genetic foundations from the Inca, Moche, and Nazca civilizations. The Quechua and Aymara peoples of the Andes developed unique genetic adaptations for high-altitude living. Spanish colonial mixing created a mestizo majority, but Indigenous genetics remain dominant. Lima shows more European influence, while the highlands and Amazon are among the most genetically Indigenous regions in the Americas.
The coast tells a different story from the highlands. From the mid-nineteenth century ships brought Chinese labourers under indenture to the guano islands and the sugar and cotton estates, and their descendants left a mark visible in almost every town's chifa restaurant, where Cantonese cooking met Andean ingredients. Japanese families began arriving in 1899 and built communities durable enough that Peru later elected a president born to them. Afro-Peruvian towns south of Lima, Chincha above all, kept musical traditions built around the cajon, the box drum that grew out of coastal Peru and later crossed into flamenco. Add Italian shopkeepers in Callao and the coastal cities read as an immigrant map, while the Andean valleys behind them stayed Quechua-speaking.
๐งฎ Where Peru's 34 Million Actually Comes From
INEI's results platform for the Censos Nacionales 2025 gives Peru a total population of 34,157,732 โ 16,865,658 men (49.4%) and 17,292,074 women (50.6%), an average age of 34.2, a median age of 32, and a density of 26.7 people per square kilometre. The calculator on this page divides by 34 million, so it is worth knowing what that number is.
INEI does not present it as a headcount. The platform defines poblaciรณn total as the official estimate of everyone habitually resident in the territory, and states how it is arrived at: Suma de la Poblaciรณn Censada mรกs la Poblaciรณn Omitida estimada por la EPC โ the censused population plus the omitted population as estimated by the post-census survey. Both parts are published: 32,706,028 censused and 1,451,704 estimated as missed. They add up to the 34,157,732 above.
Two cautions travel with the number. A note headed Tener en cuenta says that because the published figures are rounded, adding up the totals for smaller geographic units can come out slightly different from the figure shown for a larger one. And the platform's own footnote reads Datos censales al 15 de julio del aรฑo 2026 de acuerdo con la documentaciรณn oficial sobre lรญmites territoriales vigentes โ the data are referenced to the official documentation on territorial boundaries as of 15 July 2026. It is a count with its corrections written next to it, which is more than most figures on this page can say.
๐๏ธ Eye Color
| Brown | 72% |
| Dark Brown | 18% |
| Hazel | 5% |
| Green | 3% |
| Blue | 2% |
๐ Hair Color
| Black | 65% |
| Dark Brown | 25% |
| Brown | 7% |
| Other | 3% |
๐ฉธ Blood Type
| O+ | 60% |
| A+ | 18% |
| B+ | 6% |
| AB+ | 1% |
| O- | 10% |
| A- | 3% |
| B- | 1% |
| AB- | 1% |
Trait frequencies on this page come from public and institutional datasets โ see Data Sources.
🧮 Calculate Your Rarity in Peru
Pick your eye colour, hair colour and blood type. The calculator uses Peru's own figures from the tables above, not world averages.
This is an estimate, not a measurement. It multiplies three national frequencies as if they were independent, and they are not: eye and hair colour share pigmentation genes, so a combination that tends to run together, such as blue eyes with blonde hair, is more common than the multiplication suggests, while one that rarely does, such as blue eyes with black hair, is rarer. Blood type is independent of both. The frequencies are national averages from public datasets — see Data Sources.
That number describes the body you were born with. Fraeon, our other site, does the same arithmetic for the part you chose: the films, series, games, books, anime and manga you have actually finished. Start your log →
๐ Twenty-Six Definitions, None of Them Physical
INEI publishes a glossary for the 2025 census, the Definiciones Censales Bรกsicas, divided into sections for housing, household and person. The Poblaciรณn section runs to twenty-six defined terms: health-scheme affiliation, literacy, school attendance, occupational category, activity status, disability, fertility, whether you hold a DNI, ethnic identification, the indigenous language you learned to speak in, originary languages, birthplace, where you lived five years earlier, internal migration, infant mortality, education level, marital status, main occupation, indigenous people, branch of economic activity, relationship to the person responsible for the household, the SIS health scheme, size of establishment, information and communication technologies, and the locations of your place of study and place of work. Not one of them is a physical characteristic โ nothing about eye colour, hair colour, blood type or height.
The ethnicity entry is defined in INEI's own words as a person's identification with an ethnic group teniendo en cuenta a sus antepasados, costumbres o tradiciones โ taking account of their ancestors, customs or traditions. Appearance does not come into it. The identity entry is narrower still: it is about holding a Documento Nacional de Identidad, the DNI, and its number. And the census ran on two questionnaires rather than one, the Cรฉdula Censal de Poblaciรณn y Vivienda and a separate Cรฉdula de Comunidades Indรญgenas, so indigenous communities are recorded as entities in their own right and not only as lists of people.
๐ค Three Vowels, and Why Name Counts Wobble
Peru's Ministry of Culture records that Quechua has an official alphabet, fixed by Resoluciรณn Ministerial 1218-85-ED in November 1985, with 34 graphemes. The vowels in it are a, i and u, plus their long forms aa, ii and uu โ there is no e and no o. The same resolution fixed the Aimara alphabet at 32 graphemes. The ministry counts 3,805,531 people who learned to speak in Quechua and 450,010 who learned to speak in Aimara.
That matters for counting. An alphabet is a ruling about which letters exist, so the same name written under the 1985 Quechua alphabet and written with Spanish letters is two different strings. Any tally of how many people share a surname depends on which spelling the list was compiled in โ a question about record-keeping, not about the people on it. The ministry's register lists 48 originary languages in Peru, 4 spoken in the Andes and 44 in the Amazon, so it is not a narrow question.
โญ Rare Facts About Peru
Which numbers here are official, and which are not
The population figure is Peru's own. INEI's Censos Nacionales 2025 results platform gives a total of 34,157,732, which INEI defines as the censused population plus a post-census estimate of the people it missed. The language and originary-language counts come from the Ministry of Culture's BDPI register. The eye colour, hair colour, blood type and height figures are not institutional: the Poblaciรณn section of INEI's published census glossary defines twenty-six terms and not one of them is a physical characteristic of this kind, and no Peruvian body is cited here for those distributions, so read them as estimates. Last checked September 2026. See Data Sources.