This is a list of the densest neighborhoods (sometimes also known as, urban subdivisions or urban districts) with over 30,000 inhabitants per square kilometre (78,000/sq mi) in the world with an area of at least 1 km2.
Most are districts of large cities and may vary significantly in regional importance.
Note this list is not exhaustive as data is hard to come by for many places on earth.
At least a dozen barangays have population densities over 200,000 people per square km, which are very small sections or neighborhoods (not city districts) within Manila, with the highest that of Barangay 717 at 277,007.3 people per square km.