http://stats.bls.gov/cpi/
Bureau of Labor Statistics Consumer Price Index.

https://www.census.gov
"U.S. Census Bureau is the preeminent collector and provider of timely, relevant, and quality data about the people and economy of the United States."

https://www.census.gov/programs-surveys/economic-census.html

Economic Census

 https://www.census.gov/topics/income-poverty/poverty.html

The Census Bureau provides poverty data from several household surveys and programs. Here you can find poverty estimates, learn about these surveys and programs, and get guidance on how to choose the right estimate for your needs.

https://www.census.gov/economic-indicators/
Economic Indicators.

https://factfinder.census.gov/faces/nav/jsf/pages/index.xhtml

U.S. Census Bureau publishes American FactFinder, a source for population, housing, economic, and geographic data.

http://www.health.state.pa.us/hpa/stats/
Pennsylvania Department of Health-Health Statistics.

https://www.cia.gov/library/publications/the-world-factbook/ 
"The World Factbook is produced by CIA's Directorate of Intelligence.  The Factbook is a comprehensive resource of facts and statistics on more than 250 countries and other entities."

http://pasdc.hbg.psu.edu/Data/tabid/1010/Default.aspx
The Pennsylvania State Data Center is the Commonwealths Official Source of population and demographic information. The following information from the Demographic Profiles is available from the Pennsylvania State Data Center: County Demographic Profiles; Municipal Demographic Profiles; Population by Age and the Median Age, County Level; Percentage Change in Population, 1990-2010 for Aged 65 and Over, Housing Units, Total, Occupied, Vacant and Seasonal; Race Breakdown of Hispanic/Latino; Housing Unit Percent Change; Pennsylvania Counties, 1990-2010.

http://www.robertniles.com/data/
You've cast your lines into the sea of sources, but still aren't finding the information you need. That's what happens when you don't know the right place to look. Scroll down to the links below and your days of coming up empty while reporting are over. You'll soon be checking facts and downloading reputable data on everything from public safety to campaign contributions ... you name it. Robert Niles, a journalist and statistician, created this annotated directory of web sites dealing with data and statistics.  It is arranged by subject.  He earned a master's degree in journalism from Indiana University and a bachelor's degree from Northwestern University's Honors Program in Mathematical Methods in the Social Sciences.

https://www.census.gov/quickfacts/fact/table/US/PST045217

U.S. Census Bureau publishes USA QuickFacts, frequently requested Census Bureau information at the national, state and county level.