United Nations Population Information Network
A guide to population information on UN system web sites

United Nations Human Settlements Programme (UN-Habitat)
   Promotes socially and environmentally sustainable human settlements development and the achievement of adequate shelter for all. (About UNCHS)
Global Urban Observatory and Statistics
  The Global Urban Observatory (GUO) works to improve the world-wide base of urban knowledge by helping Governments, local authorities and organizations of the civil society develop and apply policy-oriented urban indicators, statistics and other urban information. The main area of work is the generation, analysis and dissemination of global, regional and national urban indicators and statistics.