Statewide Database | Zipcode Reports

ZIP Code Reports

ZIP Code Reports
Year	Report	Organization	Description
The reports below are for the current, 2011 State Districts.
2012	Download	ZIP Codes by 2011 Assembly District.	These conversions are derived from the 2012 Primary Election registered voter file for California. NUMBER refers to the number of registered voters who are in both a particular ZIP Code and Assembly District. PCT is the percent of the ZIP Code in the Assembly District. TOTAL is the total number of registered voters in the ZIP Code. For example, if there are 1000 people in ZIP Code 91902, and 400 are in AD 80 and 600 are in AD 79, then 40% of the ZIP is in AD 80 and 60% of the ZIP is in AD 79.
2012	Download	ZIP Codes by 2011 Congressional District.	These conversions are derived from the 2012 Primary Election registered voter file for California. NUMBER refers to the number of registered voters who are in both a particular ZIP Code and Congressional District. PCT is the percent of the ZIP code in the Congressional District. TOTAL is the total number of registered voters in the ZIP Code. For example, if there are 1000 people in ZIP code 90001, and 400 are in CD 40 and 600 are in CD 43, then 40% of the ZIP is in CD 40 and 60% of the ZIP is in CD 43.
2012	Download	ZIP Codes by 2011 Senate District.	These conversions are derived from the 2012 Primary Election registered voter file for California. NUMBER refers to the number of registered voters who are in both a particular ZIP code and Senate District. PCT is the percent of the ZIP code in the Senate District. TOTAL is the total number of registered voters in the ZIP Code. For example, if there are 1000 people in ZIP code 90001, and 400 are in SD 30 and 600 are in SD 33, then 40% of the ZIP is in SD 30 and 60% of the ZIP is in SD 33.
The reports below are for the previous, 2001 State Districts.
2002	Download	ZIP Codes by the State of CA 2001 Districts. Based on a geographical overlay.	Overlay of the assembly, senate, and congressional districts on a layer of ZIP code points. Please note that this is based on USPS ZIP codes circa 2002.
The reports below are for the 1991 State Districts.
1998	Download	1991 Assembly Districts by ZIP Code. Based on the June, 1998 Primary Election Voter File.	List of five digit ZIPs and the percent of each ZIP in each Assembly District. Created by processing the registered voter tape for the state's 58 counties and then creating a cross-reference table of ZIP code and Assembly District (each individual voter record has this information attached to it). The counts are the number of registered voters who are in both a particular ZIP and the Assembly District. Percent is the percent of the ZIP code in the Assembly District, so if there are 1000 people in ZIP code 91999, and 400 are in AD 79 and 600 are in AD 80, then 40% of the ZIP is in AD 79 and 60% of the ZIP is in AD 80. ZIPs with counts of less than one hundred statewide are not reported due to the likelihood that these are typographical or reporting errors.
1998	Download	ZIP Codes by 1991 Assembly Districts. Based on the June, 1998 Primary Election Voter File.	Same as the above report except sorted by ZIP code rather than by Assembly District.
1998	Download	1991 Congressional Districts by ZIP Code. Based on the June, 1998 Primary Election Voter File.	List of five digit ZIPs and the percent of each ZIP in each Congressional District. Created by processing the registered voter tape for the state's 58 counties and then creating a cross-reference table of ZIP code and Congressional District (each individual voter record has this information attached to it). The counts are the number of registered voters who are in both a particular ZIP and the Congressional District. Percent is the percent of the ZIP code in the Congressional District, so if there are 1000 people in ZIP code 91999, and 400 are in CD 01 and 600 are in CD 02, then 40% of the ZIP is in CD 01 and 60% of the ZIP is in CD 02. ZIPs with counts of less than one hundred statewide are not reported due to the likelihood that these are typographical or reporting errors.
1998	Download	ZIP Codes by 1991 Congressional Districts. Based on the June, 1998 Primary Election Voter File.	Same as the above report except sorted by ZIP code rather than by Congressional District.
1998	Download	1991 Senate Districts by ZIP Code. Based on the June, 1998 Primary Election Voter File.	List of five digit ZIPs and the percent of each ZIP in each Senate District. Created by processing the registered voter tape for the state's 58 counties and then creating a cross-reference table of ZIP code and Senate District (each individual voter record has this information attached to it). The counts are the number of registered voters who are in both a particular ZIP and the Senate District. Percent is the percent of the ZIP code in the Senate District, so if there are 1000 people in ZIP code 91999, and 400 are in SD 01 and 600 are in SD 02, then 40% of the ZIP is in SD 01 and 60% of the ZIP is in SD 02. ZIPs with counts of less than one hundred statewide are not reported due to the likelihood that these are typographical or reporting errors.
1998	Download	ZIP Codes by 1991 Senate Districts. Based on the June, 1998 Primary Election Voter File.	Same as the above report except sorted by ZIP code rather than by Senate District.

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