English: 640 districts in India (2011 census)

(There are 641 as of July 2011. I've no idea where the 641st is.)

Here are some conflicting numbers of districts in India. The higher ones are more up to date.

599 districts: http://dolr.nic.in/Hyperlink/distlistnew.htm 626 districts: http://india.gov.in/knowindia/districts.php 627 districts: http://districts.nic.in/dstats.aspx 640 districts: http://en.wikipedia.org/wiki/List_of_districts_of_India 641 districts: http://panchayatdirectory.gov.in/

Census codes are available at http://pmgsy.nic.in/