Where to find ACS 2019 5-year Data?

It seems everybody has a different preferred source! I'd summarize this way:

• The Census Bureau's interactive data browsing interface is here: https://data.census.gov
• Documentation and links to the complete 2019 5-year ACS summary files (detailed "B" and "C" tables) are here. 
• IPUMS USA is an alternative source for ACS public use microdata, with harmonized variables across time, thorough documentation, and lots of other helpful resources
• IPUMS NHGIS is an alternative source of ACS summary files, enabling download of nationwide data files at any geographic level, corresponding nationwide GIS shapefiles, and time series tables that link 2019 5-year data with earlier census data. (I manage NHGIS, so I can tell you we're also on track to add all 5-year ACS data to our time series tables in the coming weeks.)

Thanks Jonathan, that second link is great, and thanks for the other links as well. 

Thanks Jonathan, that second link is great, and thanks for the other links as well.