Good day Coarc,
I'm assuming by western world, you mean North and South American,
and Europe. There are hundreds of areas with a population greater than
250,000.
United Nations Demographic Yearbook - Capital cities and cities of
100,000 and more inhabitants
http://www.un.org/Depts/unsd/demog/index.htm
The above United Nations site has statistics on all cities with a
population greater than 100,000. To navigate, you'll have to click on
the continent in the world map. A list of countries will appear, and
you'll have to click on the country you want.
Indicators on human settlements
http://unstats.un.org/unsd/demographic/social/hum-set.htm
The above United Nations site has percentage of urban and rural
settlements for each country, in case you are looking for ratio of
urbal to rural.
I hope this answers your question. If not, please request for a
clarification and be a bit specific...like which particular
countries/cities you want, and what information exactly you want. |