http://census.gov/popest/data/cities/totals/2015/sub-est2015.html

http://census.gov/popest/data/cities/totals/2015/sub-est2015-3.html

https://census.gov/popest/data/cities/totals/2015/sub-est2015-3.html

http://factfinder.census.gov/faces/tableservices/jsf/pages/productview.xhtml?src=bkmk

http://factfinder.census.gov/bkmk/cf/1.0/en/place/oakland city, california/population/pep_est

http://census.gov/popest/data/cities/totals/2014/sub-est2015.html

http://census.gov/popest/data/cities/totals/2014/sub-est2014-3.html

http://census.gov/popest/data/cities/totals/2015/files/sub-est2015_1.csv

http://census.gov/popest/data/counties/totals/2015/co-est2015-01.html