Table 2 Settlement classes, their population thresholds and characteristics.

From: A suite of global accessibility indicators

Settlement class Minimum population threshold (>=) Maximum population threshold (<) Number of settlements in 2015 Sum of population in 2015 in these settlements Source of settlement data
1 5,000,000 50,000,000 79 941,207,809 HDC
2 1,000,000 5,000,000 421 851,153,118 HDC
3 500,000 1,000,000 581 400,180,511 HDC
4 200,000 500,000 2,096 630,823,940 HDC
5 100,000 200,000 3,694 515,557,120 HDC
6 50,000 100,000 6,973 484,166,417 HDC
7 20,000 50,000 20,457 628,095,955 LDC
8 10,000 20,000 29,286 410,631,333 LDC
9 5,000 10,000 45,795 322,797,326 LDC