Spotted Lanternfly inFairfax County, VASPOTTED LANTERNFLY GUIDE
Fairfax County is the largest county in Virginia by population and has seen widespread SLF establishment since confirmation in 2022. Bull Run and stream valley corridors have become major SLF zones. Heavy Tree of Heaven in stream valleys throughout the county has created ideal conditions for rapid spread into residential and commercial areas.
Highest activity zones
SLF Hotspots in Fairfax County, VA
Bull Run stream corridor
Active zone
Lake Fairfax park area
Active zone
Route 50 corridor
Active zone
Annandale area
Active zone
Stream valleys (heavy ToH)
Active zone
Primary SLF food source
Tree of Heaven in Fairfax County, VA
Fairfax County's extensive stream valley network is heavily colonized by Tree of Heaven, providing ideal SLF habitat corridors through residential and commercial zones. Bull Run margins and Route 50 corridor Ailanthus populations continue to support large SLF populations.
Identify Tree of Heaven →Local action resources
What To Do in Fairfax County, VA
Report a Sighting
Every sighting in Fairfax County, VA maps the invasion front. Report directly to VDACS.
Report Now →Squish on Sight
See a spotted lanternfly? Kill it immediately — it is legal and encouraged in all states. Learn the best kill methods.
Full Fight Guide →Map ToH in Your Block
Tree of Heaven removal cuts off SLF food supply. Add ToH sightings to the community map to guide removal efforts.
View Sighting Map →Statewide resources
Full VA State Guide
County-level data, quarantine zones, treatment guides, and agency resources for the entire state.
See the full VA guide →Community intelligence
Live Sighting Map
See where SLF has been spotted near you in Fairfax County, VA. Add your own sighting to help map the front.
Open the Map →Free weekly fight briefing
Fight SLF in Fairfax County, VA.
One email per week. Your zip code. Your threat level. Your action plan. Know exactly what to do this week in Fairfax County, VA.