FEMA Flood Zone Polygons
Arlington County - GIS Portal
Updated Nov 2, 2026
About this dataset
<p style='margin-top:0px; margin-bottom:1.5rem; font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px;'><span style='font-family:inherit;'>A polygon feature class of Federal Emergency Management Agency (FEMA) flood hazard zones within Arlington County. The data depicts the inundation limits representing flood risk information and supporting data. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual-chance flood event, and areas of minimal flood risk. The FIRM Database is derived from Flood Insurance Studies (FISs), previously published FIRMs, flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by FEMA.</span></p><p style='margin-top:0px; margin-bottom:1.5rem; font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px;'><span style='font-family:inherit;'>If you need more information about individual tables in the National Flood Hazard Layers, the FIRM Database Technical Reference, found at FEMA</span><span style='font-family:inherit;'>’</span><span style='font-family:inherit;'>s </span><a href='https://www.fema.gov/media-library/assets/documents/34519' style='color:rgb(0, 97, 155); font-family:inherit;' rel='nofollow ugc'><span style='font-family:inherit;'>Technical References</span></a><span style='font-family:inherit;'>, includes those details.</span></p><p style='margin-top:0px; margin-bottom:1.5rem;'><font face='Avenir Next W01, Avenir Next W00, Avenir Next, Avenir, Helvetica Neue, sans-serif'><span style='font-size:16px;'>If you would like to view the complete national level data, access the full </span></font><a href='https://www.arcgis.com/home/item.html?id=ae38b6f94eaf4abf97f986fa01921e13' target='_blank' rel='nofollow ugc noopener noreferrer'>FEMA National Flood Hazard</a><font face='Avenir Next W01, Avenir Next W00, Avenir Next, Avenir, Helvetica Neue, sans-serif'><span style='font-size:16px;'> data set and add it to the map.</span></font></p><p style='margin-top:0px; margin-bottom:1.5rem; font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px;'><span style='font-family:inherit;'>Contact: Department of Environmental Services</span></p><p style='margin-top:0px; margin-bottom:1.5rem; font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px;'><span style='font-family:inherit;'>Data Accessibility: Publicly Available</span></p><p style='margin-top:0px; margin-bottom:1.5rem; font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px;'><span style='font-family:inherit;'>Update Frequency: As Needed</span></p><p style='margin-top:0px; margin-bottom:1.5rem; font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px;'><span style='font-family:inherit;'>Last Revision Date: </span><span style='font-family:inherit;'>2/3/2026</span></p><p style='margin-top:0px; margin-bottom:1.5rem; font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px;'><span style='font-family:inherit;'>Creation Date: </span><span style='font-family:inherit;'>11/14/2023</span></p><p style='margin-top:0px; margin-bottom:1.5rem; font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px;'><span style='font-family:inherit;'>Feature Dataset Name: FEMA</span></p><p style='margin-top:0px; margin-bottom:1.5rem; font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px;'><span style='font-family:inherit;'>Layer Name: FEMA_FloodZones_poly</span></p><p style='margin-top:0px; margin-bottom:1.5rem; font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px;'><span style='font-family:inherit;'><a href='https://arlgis.maps.arcgis.com/sharing/rest/content/items/81f2b437d12147d2a7ad20dfa5488acb/data' style='color:rgb(0, 97, 155); font-family:inherit;' target='_blank' rel='nofollow ugc noopener noreferrer'><span style='font-family:inherit;'>Metadata Document</span></a></span></p>
Data and resources (7)
- HTML
ArcGIS Hub Dataset
Modified Jul 2, 2026
- ArcGIS
ArcGIS GeoService
Modified Jul 2, 2026Map preview available
- CSV
CSV
Modified Nov 2, 2026Table and Data API available
- ZIP
Shapefile
Modified Jul 2, 2026Map preview available
- GeoJSON
GeoJSON
Modified Jul 2, 2026Map preview available
- KML
KML
Modified Jul 2, 2026Map preview available
- ZIP
File Geodatabase
Modified Jul 2, 2026