Top 10 largest Cities in World

City[a] Country Skyline UN 2018 population estimates[13] City proper[b] Metropolitan area[c] Urban area (Demographia)[12] Definition Population Area (km2) Population Area (km2) Population Area (km2) Tokyo  Japan 37,400,068 Metropolis prefecture 13,515,271[14] 2,191[14] 37,274,000[15] 13,452[15] 38,505,000 8,223[d] Delhi  India 28,514,000 National capital territory 16,753,235[16] 1,484 29,000,000[17] 3,483[17] 28,125,000 2,240[e] Shanghai  China 25,582,000 Municipality 24,183,000[18] 6,341 N/A N/A 22,125,000 4,015[f] São Paulo  Brazil 21,650,000 Municipality 12,252,023[19] 1,521 21,734,682[20] 7,947 20,935,000 3,043[g] Mexico City  Mexico 21,581,000 City-state 8,918,653[21] 1,485 20,892,724[22] 7,854 20,395,000 2,370 Cairo  Egypt 20,076,000 Urban governorate 9,500,000[23] 3,085 N/A N/A 16,925,000 1,917 Mumbai  India 19,980,000 Municipality 12,478,447[24] 603 24,400,000[25] 4,355[26] 23,645,000 881[h] Beijing  China 19,618,000 Municipality 21,707,000[18] 16,411 N/A N/A 19,430,000 4,144 Dhaka  Bangladesh 19,578,000 Capital city 14,399,000[27] 338[28] 14,543,124[27] 18,595,000 453 Osaka  Japan 19,281,000 Designated city 2,725,006[14] 225[14] 19,303,000[15] 13,228[15] 17,150,000 3,004[i]