PaSDC Dashboards -- The Pennsylvania State Data Center has created dashboards of U.S. Census Bureau data for various demographics of the Commonwealth.
PA.gov -- the official website for the Commonwealth of Pennsylvania
The Western Pennsylvania Regional Data Center (WPRDC) -- The Data Center maintains Allegheny County and the City of Pittsburgh’s open data portal and provides several services to data publishers and users. The Data Center also hosts datasets from these and other public sector agencies, academic institutions, and non-profit organizations. It is managed by the University of Pittsburgh’s Center for Social and Urban Research and is a partnership of the University, Allegheny County, and the City of Pittsburgh.
OpenDataPhilly -- a catalog of open data in the Philadelphia region. In addition to being the official open data repository for the City of Philadelphia, it includes data sets from many organizations in the region.
Keywords to try when locating data specific to your town/city or neighborhood:
cohort -- "a group of persons sharing a particular statistical or demographic characteristic
dashboard -- "web page or portal that provides links to key information and useful tools on a website"
demographics -- "the statistical data of a population, especially those showing average age, income, education, etc."
vital statistics -- "statistics concerning human life or the conditions affecting human life and the maintenance of population" (examples: birth, death, marriage, divorce)
definitions derived from dictionary.com