A subdistrict or sub-district is an administrative division that is generally smaller than a district.
Equivalents
Administrative posts of East Timor, formerly Portuguese-language
Kelurahan, in Indonesia
Mukim, a township in Brunei, Indonesia, Malaysia, and Singapore
Nahiyah, in Palestine
Tambon, a township in Thailand
Tehsil (also known as tahsil, taluka, taluk, circle, mandal or subdivision), a township in India
Upazila, in  Bangladesh
Translations
Subdistricts of China (), in Mainland China, literally streets and avenues
References
