I would like to download 2010 Census Block Data for several towns and I can't seem to find it on American Factfinder.
Is it there? And if not, does anyone know where I could find it?
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It is on the new version of American Factfinder and don't feel bad, even Census Bureau employees are confounded by the new site.
Example for population and housing for Newark, DE:
Choose 'Advanced Search' > 'Show Me All'
Start searching for the theme you're after:
Under Topics choose People > Basic Count/Estimate > Population Total and Housing > Basic Count/Estimate > Housing Units - or whatever you're interested in. Your results will show up in the table list in the main window.
Click on Geographies, a window for selecting geographies opens. Note if you select a geography where the table above is not available, you'll get a message and your options will reflect what is available at this geographic level.
If you want to further filter your results to a race/ethnic group, click Race and Ethnic groups
Click from the table list in the main window to add to your download list
Click the download button and verify your .zip creation and download
When your download is finished, open the .zip and see the file ending with _with_ann.csv
Here is an image showing how to open the CSV in LibreOffice - ensure the GEO.id2 column is read as 'TEXT' so that leading 0's are kept (and ensure you set up the proper column data type if you import into PostgreSQL)
And lastly the data in LibreOffice, showing that when you do import the data somewhere, discard the second and third columns so you only keep the header and data:
http://www.census.gov/geo/www/tiger/tgrshp2010/tgrshp2010.html allows you to download census blocks by county.
Update: the TIGER/shapefiles does not have any demographic data - if that's what you are looking for you would need American FactFinder.
They are available on the Census FTP site at http://www2.census.gov/geo/tiger/TIGER2010BLKPOPHU/
To get a whole state's data, you can use the ftp option here: http://www.census.gov/rdo/data/2010_census_redistricting_data_pl_94-171_summary_files.html That's probably overkill, but since with FactFinder you 1) can't select a town's blocks by themselves (only cities or counties) and 2) can't download (in my experience) a whole county's blocks through FactFinder, that may be the best option. You might check if the state has released the block data in an easier to manage format, too.
Just to add the National Historical Geographic Information System (NHGIS) to the list. It provides, free of charge, aggregate census data and GIS-compatible boundary files for the United States, currently between 1790 and 2012. For Data availability see here.
The main Census TIGER page here lists
2010 Census Population and Housing Unit Counts - Blocks:
These state based files have the population and housing unit count by block from the 2010 Census. These files are available for the 50 states and the District of Columbia only.
Unfortunately the database is down right now so I can't test it, but that looks like the right resource.
You can get block and block group census data at: http://www.census.gov/2010census/popmap/ Have to dig into the system a bit, but good data available.
I wanted to update @Sean and @DPSSpecial's response by focusing on the Census Block request. In my first attempt I found it somewhat frustrating to understand how to get block-level data.
I decided to start with Geography because I was not sure what data was available at the block level and in using the Guided search, i kept getting 0 available datasets. So, using the Advanced Search as they suggested I first didn't see Block as a selection. You have to choose the 'all geographic types' at the top of the dialog. After a minute the dialog refreshes and there is Block near the bottom.
Next is the step to narrow down your geographic area of interest. Below is an image showing my experience. For me, the biggest realization was that I did not have to pick a census tract. The UI gives no indication that this is optional. I wanted all of LA County and thought for a moment I would have to go tract by tract... But that's not the case.
I hope this helps someone.
As of 2020, the american fact finder has been taken down. 2010 block groups by state are now available from https://www2.census.gov/geo/tiger/TIGER2010BLKPOPHU/.
Use these codes to identify the right file https://www.nrcs.usda.gov/wps/portal/nrcs/detail/?cid=nrcs143_013696
Go to http://www.publicmapping.org/resources/data to get data in Excel. Great Site!