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Largest Cities by Population in Thailand (2025)

Below are the urban areas with more than 100,000 inhabitants in Thailand ranked by population.

Urban Area (or urban agglomeration) population refers to the population contained within the contours of a contiguous territory inhabited at urban density levels, typically comprising a city and its surrounding suburban fringe.

Rank Urban Area Population Estimate (2025) 1 Year Change (over 2024) Land Area (Km²) Density (P/Km²) Global Rank Projections (2030) Projections (2050)
1 Krung Thep Maha Nakhon (Bangkok) 18,180,280 1.03% 2,661 6,832 14 18,973,005 20,462,207
2 Chiang Mai 626,629 −0.1% 213 2,942 864 620,278 574,130
3 Hat Yai 407,059 −0.09% 78 5,219 1,387 403,114 379,192
4 Phuket 389,376 −0.39% 103 3,780 1,465 385,708 363,046
5 Lop Buri 378,160 3.97% 110 3,438 1,500 407,983 469,212
6 Chon Buri 297,276 1.48% 142 2,093 1,943 314,766 356,073
7 Khon Kaen 274,613 −0.45% 88 3,121 2,114 264,057 230,439
8 Pattaya 238,411 1% 91 2,620 2,456 254,619 283,102
9 Nakhon Pathom 232,416 1.73% 72 3,228 2,527 247,286 313,228
10 Nakhon Ratchasima 219,863 −0.58% 74 2,971 2,688 209,783 166,338
11 Songkhla 213,186 −0.08% 64 3,331 2,781 211,220 199,315
12 Phra Nakhon Si Ayutthaya 211,344 1.31% 68 3,108 2,811 224,118 293,124
13 Ubon Ratchathani 191,866 −0.94% 55 3,488 3,132 186,548 162,207
14 Phitsanulok 189,643 −0.33% 58 3,270 3,171 184,089 161,197
15 Lampang 175,646 −0.09% 43 4,085 3,444 173,933 163,990
16 Nakhon Si Thammarat 151,713 −0.1% 36 4,214 3,993 150,107 141,500
17 Thanyaburi 146,811 2.03% 45 3,262 4,147 155,517 180,639
18 Udon Thani 139,189 −0.95% 47 2,961 4,382 132,722 105,721
19 Tha Chang 133,416 1.23% 35 3,812 4,571 161,826 186,843
20 Ranong 126,669 −0.08% 27 4,691 4,826 125,487 118,542
21 Surat Thani 126,423 −0.11% 45 2,809 4,833 125,064 100,789
22 Yala 113,021 −0.1% 23 4,914 5,457 111,836 105,498
23 Chiang Rai 112,713 −0.09% 27 4,175 5,472 110,132 103,755
24 Nakhon Sawan 105,331 −0.35% 34 3,098 5,856 102,945 84,773
25 Sattahip 102,065 1.21% 39 2,617 6,052 107,681 169,375
26 Thalang 100,444 −0.08% 31 3,240 6,151 99,526 92,410
27 Saraburi 99,411 1.14% 29 3,428 6,212 106,006 138,125
28 Ban Phaeo 97,791 8.95% 34 2,876 6,329 111,208 189,063
29 Uttaradit 95,103 −0.08% 21 4,529 6,494 94,202 88,310
30 Phetchaburi 90,351 1.31% 24 3,765 6,863 97,709 105,197
31 Suphan Buri 86,952 1.56% 28 3,105 7,158 114,467 156,529
32 Ratchaburi 81,268 1.9% 24 3,386 7,675 84,855 95,982
33 Pattani 80,097 −0.52% 20 4,005 7,784 79,305 75,002
34 Chachoengsao 79,378 1.41% 22 3,608 7,858 84,717 93,581
35 Kanchanaburi 78,800 1.15% 27 2,919 7,917 85,916 94,459
36 Kamphaeng Phet 77,135 −0.32% 22 3,506 8,086 75,495 67,559
37 Buri Ram 75,480 −1.4% 20 3,774 8,252 72,983 61,893
38 Saen Suk 74,389 −0.47% 23 3,234 8,388 72,241 59,563
39 Map Ta Phut 73,495 1.62% 40 1,837 8,473 77,577 96,407
40 Trang 72,063 −0.1% 19 3,793 8,635 71,333 67,411
41 Roi Et 71,470 −0.46% 22 3,249 8,695 69,424 59,913
42 Rayong 71,127 – 47 1,513 8,727 74,717 117,223
43 Pa Tong 70,931 −0.1% 9 7,881 8,752 70,209 66,049
44 Phatthalung 68,108 −0.1% 13 5,239 9,107 67,407 63,573
45 Phrae 67,504 −0.1% 22 3,068 9,177 66,796 –
46 Prachin Buri 66,758 1.26% 15 4,451 9,287 73,588 89,708
47 Mukdahan 65,415 −0.44% 14 4,673 9,471 63,636 57,489
48 Kalasin 62,932 −0.45% 16 3,933 9,841 61,173 52,873
49 Sakon Nakhon 62,237 −0.45% 15 4,149 9,981 60,491 54,551
50 Phetchabun 60,742 −0.8% 19 3,197 10,210 59,414 –
51 Nakhon Phanom 60,665 −0.44% 15 4,044 10,224 59,005 51,175
52 Chumphon 58,934 −0.1% 16 3,683 10,488 58,309 52,008
53 Klaeng 56,897 – 14 4,064 10,825 59,899 74,015
54 Maha Sarakham 55,782 −0.97% 17 3,281 11,047 54,208 –
55 Tha Pha 52,916 – 22 2,405 11,626 55,411 88,462
56 Nong Khai 50,265 −0.47% 15 3,351 12,093 – –

See also

Source: United Nations, Department of Economic and Social Affairs, Population Division (2025). World Urbanization Prospects: The 2025 Revision, Online Edition.