Demographic features of the population of Yemen include population density, ethnicity, education level, health of the populace, economic status, religious affiliations and other aspects of the population.

The Al-Muhamashīn, "the marginalized ones"); previously called al-Akhdām, Akhdām or Achdām, are an Arabic-speaking ethnic group whose members live in Yemen. Although the Muhamashīn are Arabic-speaking Muslims just like most other Yemenis, they are considered to be at the very bottom of the supposedly abolished caste ladder, they are socially segregated from other Yemenis and they are mostly confined to menial jobs in the country's major cities. According to unofficial estimates, the Muhamashīn number between 500,000 and 3,500,000 individuals.