Spotted Lanternfly inMontgomery County, MDSPOTTED LANTERNFLY GUIDE
Montgomery County is one of the most heavily infested counties in the DMV. Confirmed in 2022, SLF populations have spread throughout the county's stream valleys, parks, and residential corridors. The dense tree canopy and extensive Ailanthus network along Rock Creek and Sligo Creek have created natural spread highways.
Maryland issued a statewide quarantine in March 2026. All movement of regulated articles from Montgomery County requires a permit from MD MDA.
Highest activity zones
SLF Hotspots in Montgomery County, MD
Rock Creek Park
Active zone
Silver Spring/Wheaton area
Active zone
Georgia Ave corridor
Active zone
Sligo Creek Trail
Active zone
Great Falls area
Active zone
Primary SLF food source
Tree of Heaven in Montgomery County, MD
Tree of Heaven is widespread throughout Montgomery County's stream corridors and road margins. Rock Creek Park and Sligo Creek Trail have dense Ailanthus populations fueling SLF establishment. The Georgia Ave and Route 29 corridors are heavily colonized.
Identify Tree of Heaven →Local action resources
What To Do in Montgomery County, MD
Report a Sighting
Every sighting in Montgomery County, MD maps the invasion front. Report directly to MD MDA.
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 MD State Guide
County-level data, quarantine zones, treatment guides, and agency resources for the entire state.
See the full MD guide →Community intelligence
Live Sighting Map
See where SLF has been spotted near you in Montgomery County, MD. Add your own sighting to help map the front.
Open the Map →Free weekly fight briefing
Fight SLF in Montgomery County, MD.
One email per week. Your zip code. Your threat level. Your action plan. Know exactly what to do this week in Montgomery County, MD.