vincilbishop / free_zipcode_data

Free USA postal codes in CSV format, gleaned from US census data and other sources.

Free Zipcode Data

We got sick and tired of trying to find free zipcode data. So we pulled down all the census data we could find, parsed it and exported it into these .csv files.

CSV Data

all_us_counties.csv

name, state, county_seat

all_us_states.csv

abbr, name

all_us_zipcodes.csv

code, city, state, county, area_code, lat, lon

Both lat and lon, geocodes, are populated for each zipcode record.

SQL Data

counties_states_zipcodes.sql

This is a MySQL ready dump of the three tables counties, states and zipcodes. Both structure and data, along with complete and extended INSERTs are included in the dump.

Updating

Please add any missing data, or correct mistakes, and send us a pull request.

Errata

05/04/2011:

• Removed un-assigned zipcodes, which were not valid for today
• Added a Rakefile and some rake tasks to facilitate building a SQLite relational database for the three tables (states, counties, zipcodes)
• Zipcodes without an associated county == 0
• Counties without a zipcode == 1 (PISCATAGUIS, Maine)

01/24/2011:

• 670 orphaned zipcodes without an associated county
• 1 county without any zipcodes (PISCATAGUIS, Maine)

01/13/2011:

At last check there were ...

• 897 orphaned zipcodes without an associated county
• 1 county without any zipcodes (PISCATAGUIS, Maine)