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I would like to download 2010 census population,aging and housing information at blockgroup level.Such as Total population,age_5_9...,age_85_up,Household Count,Housing_units,SQML etc

marked as duplicate by Ian Turton Oct 26 '17 at 16:01

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Use TIGER census data from the Census bureau. https://www.census.gov/geo/maps-data/data/tiger-line.html

As for at the block group level, I think you will have to do some field calculations yourself based on what is in there but it should be simple enough (~10 minutes).

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