The Utmanzai or Utmanzai Wazir (trans. "descendants of Utman", and also spelled Uthmanzai, Othmanzai) are a Sunni Muslim Pashtun tribe found in North Waziristan Agency, Pakistan. Their territory lies on the border with Afghanistan and historically they migrated between the hills during the summer and the valleys in the winter. Although primarily a pastoral tribe, they and the related Mehsud tribe — with whom they have a historical antipathy — were described by Arnold Fletcher in 1965 as "perhaps the most powerful and aggressive of the border Pushtoons". The Utmanzai speak mostly Pushto and Hindko.