Spotted Lanternfly inDauphin County, PASPOTTED LANTERNFLY GUIDE
Dauphin County — with Harrisburg as its county seat and Pennsylvania's state capital — confirmed SLF in 2019, placing the corridors of state government and major interstate freight infrastructure squarely within the infestation zone. The Susquehanna River corridor through Harrisburg is a primary SLF spread pathway, connecting populations north and south through the heart of Pennsylvania. Wildwood Park — an urban wildlife park with significant Tree of Heaven — has become one of the most notable SLF hotspots in the capital region. Penn State Extension Dauphin County operates active SLF education programs, and the I-81/I-83 interchange makes the county a critical freight hub for ongoing SLF reinforcement from surrounding established populations.
Highest activity zones
SLF Hotspots in Dauphin County, PA
Susquehanna River Heritage Area
Active zone
Wildwood Park and Nature Center
Active zone
Reservoir Park
Active zone
I-81/I-83 interchange area
Active zone
State Farm Show Complex grounds
Active zone
Primary SLF food source
Tree of Heaven in Dauphin County, PA
Tree of Heaven is well established along the Susquehanna River corridor through Harrisburg and along the I-81 and I-83 road margins throughout Dauphin County. Wildwood Park and Nature Center has significant Ailanthus coverage within an urban wildlife area, creating a high-visibility SLF monitoring site adjacent to Harrisburg's residential neighborhoods. The State Farm Show Complex grounds and Reservoir Park margins have additional ToH populations that fuel SLF establishment in the heart of the state capital region.
Identify Tree of Heaven →Local action resources
What To Do in Dauphin County, PA
Report a Sighting
Every sighting in Dauphin County, PA maps the invasion front. Report directly to PA Department of Agriculture.
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 PA State Guide
County-level data, quarantine zones, treatment guides, and agency resources for the entire state.
See the full PA guide →Community intelligence
Live Sighting Map
See where SLF has been spotted near you in Dauphin County, PA. Add your own sighting to help map the front.
Open the Map →Free weekly fight briefing
Fight SLF in Dauphin County, PA.
One email per week. Your zip code. Your threat level. Your action plan. Know exactly what to do this week in Dauphin County, PA.