Please visit ask.census.gov for general FAQs and Census Bureau contact information.
For any questions related to our international data products, training, tools, and software, please email pop.international@census.gov.
For Census and Survey Processing System (CSPro) support, please email cspro@lists.census.gov (in English, French, or Spanish). Please attach any supporting programs or data files that are relevant to your question to your email.
For Demographic Analysis and Population Projections System (DAPPS) software support, please email pop.dapps.support@census.gov