Top Cities, version 19

1. Tokyo 1584 [s/b Tokyo $923 bn; Yokohama $320 bn; Saitama $211 bn; Chiba $197 bn]
2. New York 1407 [s/b $1281 bn]
3. Los Angeles 882 [s/b Los Angeles $556 bn; Orange County $180 bn; Riverside-San Bernadino $110 bn; Ventura $36bn]
4. Osaka (552, was 771) [a better number is $389 bn]
5. Paris 717 (EU 552) [another source says $764 bn nominal]
6. London 606 (EU 466) [another source says $752 bn nominal ]
7. Seoul 601 [s/b Seoul $343 bn; Gyeonggi $289 bn; Incheon $71 bn]
8. Washington/Baltimore 570 [s/b Washington $383 bn; Baltimore $145 bn]
9. Chicago 532 [agreed]
10. San Francisco/San Jose 515 [s/b San Francisco/Oakland $296 bn; San Jose $168 bn]
11. Rhine-Ruhr 430 (EU 331) [s/b Ruhr $203 bn; Dusseldorf $105 bn; Cologne $96 bn]
12. Shanghai/Suzhou 410 
13. Philadelphia 404 [s/b $347 bn]
14. Nagoya 386 [a better number is $372 bn]
15. Houston 385 [agreed]
16. Boston 380 [s/b $314 bn]
17. Dallas 374
18. Randstad 352
19. Milan 313 (EU 241) [s/b $177 bn]
20. Sydney 308
21. Toronto 292
22. Melbourne 275
23. Atlanta 272
24. Sao Paulo 270
25. Singapore 260
26. Miami 258
27. Beijing 248
28. Hong Kong 243
29. Guangzhou/Foshan 243
30. Mexico City 237
31. Seattle 231
32. Moscow 225
33. Buenos Aires 225
34. Madrid 215 
35. Abu Dhabi 204
36. Rio de Janeiro 201
37. Minneapolis 200
38. Montreal 199
39. Detroit 198
40. Phoenix 191 
41. Frankfurt 185 (EU 142) 
42. Tianjin (near Beijing) 178
43. Brussels 178
44. Taipei 178
45. Barcelona 177
46. Kuwait City 177
47. Denver 176
48. San Diego 172
49. Chongqing 159
50. Riyadh 154
51. Munich-Augsburg 149
52. Naples 149
53. Shenzhen 146
54. Doha, Qatar 145
55. Berlin 142 (EU 109)
56. Istanbul 141
57. Tampa/St. Petersburg/Sarasota, FL 138
58. Brisbane 138
59. Oslo 136
60. Cleveland/Akron, OH 134
61. Cincinnati/Dayton, OH 134
62. St. Louis, MO 130
63. Portland, OR 125
64. Lisbon 122 (EU 98)
65. Vancouver, Canada 121
66. Rome 120 [s/b $130 bn]
67. Stockholm 120
68. Perth 117
69. Pittsburgh 116
70. Copenhagen 116
71. Sapporo 116
72. Fukuoka 115
73. Charlotte 114
74. Hamburg 114
75. Hangzhou (south of Shanghai) 111
76. Wuxi (near Shanghai) 108
77. Kansas City 106
78. Indianapolis 105
79. Orlando 104
80. Qingdao (near Beijing) 104
81. Dubai/Sharjah 103
82. Birmingham, UK 103
83. Monterrey 102
84. Vienna 102 
85. Mumbai 100
86. Salt Lake City/Ogden/Provo 98
87. Zurich 97
88. Nanjing (near Shanghai) 97
89. Raleigh/Durham/Chapel Hill, NC 95 
90. Athens 94
91. Brasilia 94
92. Sacramento 93
93. Colombus, OH 93
94. Tel Aviv/Jaffa 92
95. Las Vegas 90
96. Jakarta, Indonesia 89
97. Dublin 89
98. Hartford, CT/Springfield, MA 88
99. Santiago, Chile 88
100. Leeds, UK 88
101. Stuttgart 87
102. Busan, South Korea 87
103. Austin, TX 86
104. Tehran, Iran 86
105. Manchester, UK 85
106. Jeddah, Saudi Arabia 85
107. Milwaukee, WI 85
108. Manila 84
109. Johannesburg/East Rand/West Rand 83
110. Wuhan, China (central China) 82
111. San Antonio, TX 82
112. Chengdu, China (near Chongqing) 82
113. Dalian, China (near Beijing) 81
114. Nashville, TN 81
115. Virginia Beach/Norfolk, VA 81
116. Shenyang, China (near Beijing) 80
117. Bangkok 75
118. New Orleans 71

Ranked by nominal GDP.
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Update: here is a better source for US GDP figures