Flood Zone Viewer
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The intent of the flood zone viewer is to assist individuals in quickly finding general flood zone information for the incorporated and unincorporated areas of San Joaquin County, and is provided as an advisory tool for flood hazard awareness.  The flood zone viewer SHOULD NOT be used as the primary resource for making official flood zone determinations for insurance, lending, or other related purposes.  This is not an official flood map. 


The flood zone viewer does not necessarily identify all areas subject to flooding.  The flood zone information contained on this site is provided by San Joaquin County using the Digital Flood Insurance Rate Map data received from the United States Department of Homeland Security, Federal Emergency Management Agency (FEMA).  This digital data is produced in conjunction with the hardcopy FIRMs and generally matches the hardcopy maps.  However, in all areas of discrepancy the hardcopy flood maps and flood profiles are the authoritative documents for the National Flood Insurance Program.


For additional information, individuals should contact the appropriate Floodplain Administrator:


San Joaquin County

(Unincorporated areas)


(209) 468-3060




City of Stockton


(209) 937-8561

City of Lathrop


(209) 941-7430

City of Lodi


(209) 333-6801

City of Manteca


(209) 239-8460

City of Tracy - Kevin Jorgensen


(209) 831-6415




Neither San Joaquin County, nor any other agency or entities thereof, assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, product, or process disclosed on this site. 


NOTE: You may need to disable any popup blockers in order to launch the viewer.