http://demographia.com/db-worldua.pdf
This report contains population, land area and population density for all 875 identified urban areas (urban agglomerations or urbanized areas) in the world with 500,000 or more population as of the volume date. The total population of these urban areas is estimated at 1.86 billion, 49 percent of the world urban population (2013).
A number of additional urban areas are also listed, including all urban areas over 100,000 in France, New Zealand, Puerto Rico, the United Kingdom and the United States and all urban areas over 50,000 in Australia and Canada. Rankings are indicated only for urban areas of 500,000 and over. The 1,524 urban areas of all sizes comprise an estimated 2.0 billion people accounting for 53 percent of the world urban population.
Demographia Observations 