Election Dist 9-Digit Zipcodes

The complete set of California residential ZIP+4 Codes on CD, based on the 2010 census and the 2012-2021 California Reapportionment, includes Assembly, Senate and Congressional Districts.

Look up California congressional and legislative election district numbers based on Postal ZIP+4 codes. Sort districts by, ZIP code, city, or county. 

Note that ZIP code boundaries can cross election district lines, which means 5-digit zip codes are not entirely accurate for determining election districts.  We estimate that 5% of addresses may be misclassified using 5-digit zip codes.  This zip+4 CD offers improved accuracy.

Files are formatted in Microsoft Access.