Reports and Statistics

Data and Maps

Maps on program enrollment status, as provided by participating counties/cities.  The most current and up to date site specific data and maps can be obtained from the county/city as the status of enrolled lands may change throughout the year.  The Department of Conservation strongly encourages you to verify specific data and the status of enrolled lands with the county/city before proceeding with any project or performing any in depth analysis, i.e. CEQA analysis. 

Williamson Act Maps (PDF)

Williamson Act GIS Data Disclaimer:

This data depicts land enrolled in Williamson Act and/or Farmland Security Zone Contracts and does not necessarily provide information as to the location of Agricultural Preserves within each county.  Please note this data is submitted to the state by participating counties and as such reflects the counties' data.  Although we are working to have all participating counties provide updated information, only some of the data is up to date as of the current year as some counties have not submitted data for several years or they have submitted paper maps that have not yet been digitized.  The most current and up to date site specific data can be obtained from the individual county/city as the status of enrolled lands may change throughout the year.  Therefore, you are strongly encouraged to verify specific data with the individual county/city before proceeding with any project or relying on this data for in depth analysis, i.e. CEQA analysis.

This data is not designed for parcel-specific planning purposes.  Fair use of this data for non-commercial, educational, research or scientific purpose is not a violation of copyright.  However, no part of the contents of this data may be reproduced, transmitted, or distributed in any form or by any means, electronic or mechanical, for any purpose without the express written permission of the Department of Conservation, Division of Land Resource Protection.  The Department of Conservation makes no warranties as to the suitability of this product for any particular purpose.

Biennial Williamson Act Status Reports

The Williamson Act Status Reports are mandated by Government Code section 51207. The purpose of the reports is to provide information to the Legislature and general public on the implementation of the Act by counties and cities. Except for the first two reports, the reports are produced in even numbered years and contain detailed enrollment statistics for the previous two years.