What is the size of Yemen? (2024)

Official geographic data for Yemen has been demonstrably inaccurate for over a century, affecting comparisons and statistics related to its size and ranking among nations.

An investigation into the stated size of Yemen has uncovered a century-long misinformation campaign based on compounded errors. Initially, a figure of 555,000 sq km was widely cited, but replicating Yemen's borders on Google Maps yielded a smaller area of 456,000 sq km. This discrepancy was traced back to a 1991 statistical yearbook that appears to have incorrectly extended Yemen's northern border with Saudi Arabia up to the 20th latitude, a border that was not clearly demarcated until after 2000. Another widely cited figure of 527,968 sq km, found in sources like the CIA World Factbook and World Bank, originated from combining inaccurate figures for North Yemen (195,000 sq km) and South Yemen (332,968 sq km). The error for North Yemen stemmed from using outdated figures from the Ottoman-era Yemeni Vilayet. South Yemen's inflated size originated from a 1976 World Bank report where an area was counted twice. These compounding errors have led to inaccurate geographic data persisting for decades.

The persistent inaccuracies in Yemen's stated size highlight a systemic issue within major international data sources, including Wikipedia, the CIA World Factbook, and the World Bank. These institutions have perpetuated errors originating from historical administrative oversights, propaganda, and simple double-counting, with a striking lack of independent verification over decades. This suggests a broader vulnerability in how geographic and statistical data is collected, aggregated, and disseminated globally, impacting the reliability of numerous factual claims.

The discovery of these century-old errors necessitates a critical re-evaluation of the data underpinning global geographic rankings and country comparisons. It raises questions about how such misinformation becomes entrenched and why it has evaded correction for so long, potentially affecting everything from geopolitical assessments to resource allocation discussions. The situation underscores the need for more rigorous and continuous fact-checking processes for foundational data points across all major information repositories.