The city with the largest Pashto-speaking population in the world is Kabul, Afghanistan.
Kabul is the capital of Afghanistan and the country's largest city. It is estimated that over 80% of the city's population speaks Pashto as their native language.
While Pashto is also spoken in other parts of Afghanistan and in neighboring countries like Pakistan, Kabul holds the distinction of having the highest concentration of Pashto speakers.
Additionally, it's worth noting that the exact number of Pashto speakers in Kabul is difficult to pinpoint due to the lack of comprehensive and reliable data. However, based on available information and estimates, Kabul remains the city with the most prominent Pashto-speaking population globally.
