Bangladesh is divided as follows
http://en.wikipedia.org/wiki/Subdivisions_of_Bangladesh
1.divisions 7 (bibhag)
2.districts 64 (jela/zila/zilla)
3.subdistricts (thana / upazila)
4.Union Parishads
Dhaka City has 90 wards(区) and 725 mahallas.
可见mahalla是达卡地区的区划名,区下设mahallas,似乎可以译为“里”“坊”?