Census American Community Survey (ACS) data is available for complete download at each level of available geography. Downloaded data includes all available subject tables listed at: https://www.census.gov/acs/www/data/data-tables-and-tools/subject-tables/
This is a map of various ACS datasets and can be used for broadband deployment planning purposes.
ACS Questionnaire. https://www.census.gov/programs-surveys/acs/methodology/questionnaire-archive.html