Top 30 Cities in the World

I've done this like 100 times, and here is my latest list:

Rank	City	Country	Pop	HDI	Pop Score
1	Tokyo/Yokohama	Japan	34800	0.912	3174
2	Seoul	S.Korea	25800	0.909	2345
3	New York	US	21600	0.937	2024
4	Los Angeles, CA	US	17200	0.937	1612
5	London	UK	15500	0.875	1356
6	Osaka/Kyoto/Kobe	Japan	16800	0.912	1532
7	Mexico City	Mexico	23800	0.775	1845
8	San Francisco/San Jose, CA	US	7200	0.937	675
9	Jakarta	Indonesia	26400	0.629	1661
10	São Paolo	Brazil	21500	0.73	1570
11	Shanghai	China	21766	0.699	1521
12	Washington DC/Baltimore	US	8100	0.937	759
13	Beijing	China	19300	0.699	1349
14	Manila	Philippines	22200	0.654	1452
15	Buenos Aires	Argentina	14500	0.811	1176
16	Paris	France	10700	0.893	956
17	Moscow	Russia	16500	0.788	1300
18	Delhi	India	24000	0.554	1330
19	Guangzhou-Foshan	China	17680	0.699	1236
20	Chicago	US	9800	0.937	918
21	Rhine-Ruhr	Germany	11300	0.92	1040
22	Mumbai	India	21400	0.554	1186
23	Miami,FL	US	5800	0.937	543
24	Karachi	Pakistan	22700	0.515	1169
25	Cairo	Egypt	16100	0.662	1066
26	Istanbul	Turkey	13800	0.722	996
27	Bangkok	Thailand	14500	0.69	1001
28	Taipei	Taiwan	8950	0.882	789
29	Hong Kong	China	7150	0.906	648
30	Tehran	Iran	13200	0.742	979

Yep, New York is #3, not #1, and London is #5.

I take the population and multiple it by the HDI to get a number, then adjust it for various factors. I like the number 30. It is big enough to be comprehensive, but also small enough to be an elite group.

Here is a list of cities that didn't make the cut, with some comments:
Singapore.  Singapore only has about 6 million people (Wikipedia says 5.4 million, another source says 6.75 million including suburbs in Malaysia), less than all these other cities, except for possibly Miami. Using the 6.75 million number, and an HDI of 0.895 gives it a score of 604, lower than every other city on the list except for, again Miami.  On a survey of what cities wealthy people prefer, Singapore and Miami are both in the top 10, with Singapore ranked higher.  So why is Miami ranked so high? Because every rich person in Latin America wants to buy a condo there.  Anyways, this is the strongest contender.  In my extended list, which I don't show here, it ranks #34, behind also Rio, Nagoya, and Boston.

Rio de Janeiro.  Miami is ranked higher.
Toronto
Zurich.  Seriously, Zurich - all 380,000 residents, maybe 1.8 million in the metro area?
Boston
Sydney
Madrid
Dallas
Houston
Berlin
Brussels
Auckland
Stockholm
Milan
Kuala Lumpur
Abu Dhabi
Johannesburg
Shenzhen
Philadelphia
Tianjin
Atlanta
Frankfurt

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Update: I am kicking Karachi off the list because of its extreme crime problems and adding Rio. It's numbers look like this:

Rio de Janeiro

Brazil

12900

0.73

942

Note that its weighted population score, calculated by multiplying the population by HDI, is at 942, and no other city in the world, other than those listed above, has a score above 900.  The next highest one is Calcutta, India, with a score of 886.