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ZIP Code Boundaries

Parcel Specific Zip Codes Sample

There are two ZIP Code boundary shapefiles – one that follows parcels and one that follows street based data better.  There is also a line version of the ZIP Codes and ZIP Code centroids included here as well.  One lines up with parcel lines and the other is based on streets.

Data can be downloaded here:

View in the new LA County Open Data Portal (DATA.LACOUNTY.GOV) – Click here.

Legal vs. Postal Cities

Many users confuse the name the Post Office delivers main to (e.g. Van Nuys, Hollywood) as a legal city (in this case Los Angeles), when they are a postal city.  The County contains 88 legal cities, and over 400 postal names that are tied to the ZIP Codes.  To support useability and geocoding, we have attached the first 3 postal cities to each address, based upon its ZIP Code.

For a full list of ZIP Code to postal city correlations, see this file: zipcodexxpostalcities (201406) – Excel file


Using GIS Data on this site

GIS Data downloaded from this site generally requires GIS software to view. Click here for a list of GIS Data Viewers

GIS data available on this website is provided AS IS - please read the GIS Data Portal Terms of Use

Data Field Descriptions
  • NAME - Zip code
  • SHAPE_AREA - Area in square feet
  • SHAPE_LEN - Perimeter in feet

GIS Source Information
Feature Dataset Name (if applicable):
Reference Date: 2010. Some small changes since then. But good data overall.
Accuracy: Parcel
Update Frequency: Unknown
Access Constraints:None

Contact Information
Todd Zagurski
GIS Specialist
Los Angeles County
Regional Planning Department
Mailstop Room 1383
Los Angeles, CA 90012

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