[alexgandy]

Here's a direct link to a CSV of the 2000 Census Fips Region/Zip code, which I believe is taken from the USPS TIGER DB:

http://www.census.gov/tiger/tms/gazetteer/zips.txt

[hhimanshu]

All I need is a mapping from county to cities, which is missing in this data too

[hhimanshu]

This is awesome, it has loads of data, I can use it all, thank you