Statistics
Portland has been ranked:
The greenest city - http://www.popsci.com/environment/article/2008-02/americas-50-greenest-cities?page=1
The most unhappy city - http://images.businessweek.com/ss/09/02/0226_miserable_cities/2.htm
The most patriotic city - http://www.oregonlive.com/pacific-northwest-news/index.ssf/2010/07/portland_now_dubbed_americas_most_patriotic_city.html
General statistics
http://www.city-data.com/city/Portland-Oregon.html
http://www.homeinsight.com/home-value/or/portland.asp
http://portlandor.areaconnect.com/statistics.htm