2010 Census Blocks clipped to the County Boundary. A new field “COMMNAME” was added and populated with city and community names based on 2011 redistricting unit community names in the census block data.

2010 Census Tracts clipped to the County Boundary. Two new fields were added to this census tract data – area in square feet and area in square miles.

City boundaries managed by the LA County Dept. of Public Works. Unincorporated areas are not distinguished by name, other than labeled unincorporated.

The County’s Enterprise GIS Steering Committee has established this site is to make high quality geographic information simple and easy to find, while providing a forum for feedback, questions, and discussion about particular data. This site was created before the new Socrata Open Data platform was introduced.

Los Angeles County will make as much GIS data as it can, available for public use (i.e. FREE). In some cases, due to licensing restrictions, privacy concerns, or outside ownership, we are unable to do so. However, we will provide information about all of our data holdings, since there may be ways to access the data if you partner with the County.

ZIP Codes in Los Angeles County.

ZIP codes are a system of postal codes used by the United States Postal Service (USPS) since 1963. Provided here because many tables and other datasets have ZIP code information within them. Managed by the USPS but provided for reference purposes.