Spotted Lanternfly inClearfield County, PASPOTTED LANTERNFLY GUIDE
Clearfield County — confirmed for SLF in 2019 — occupies the Allegheny Plateau in central Pennsylvania, where the West Branch Susquehanna River drains a vast forested landscape punctuated by small agricultural valleys and former coal towns. The I-80 east-west corridor slices through the county and serves as the primary SLF spread vector, carrying freight from established infestation zones in the Lehigh Valley and central Pennsylvania westward toward Ohio and beyond. Clearfield borough, the county seat, anchors a rural population of approximately 81,000 — widely dispersed across a large and forested county where limited cooperative extension resources make resident outreach and early detection especially challenging. The recreational forest lands of the Allegheny Plateau provide both ecological diversity and monitoring complexity as SLF populations spread into this more remote central Pennsylvania landscape.
Highest activity zones
SLF Hotspots in Clearfield County, PA
West Branch Susquehanna River corridor
Active zone
I-80 east-west freight corridor
Active zone
Clearfield borough downtown area
Active zone
Clearfield Area School District region
Active zone
Allegheny Plateau recreational forest lands
Active zone
Primary SLF food source
Tree of Heaven in Clearfield County, PA
Tree of Heaven is established along the I-80 corridor and road margins throughout Clearfield County, providing SLF dispersal pathways through the Allegheny Plateau landscape. The West Branch Susquehanna River corridor has Ailanthus colonization along riparian margins that extends SLF habitat into the surrounding forested valleys. Clearfield borough area road margins and the Clearfield Area School District region are priority monitoring zones. The county's limited cooperative extension resources for rural residents make public education and resident reporting especially important for tracking SLF advance through this remote central Pennsylvania landscape.
Identify Tree of Heaven →Local action resources
What To Do in Clearfield County, PA
Report a Sighting
Every sighting in Clearfield County, PA maps the invasion front. Report directly to Pennsylvania 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 Pennsylvania State Guide
County-level data, quarantine zones, treatment guides, and agency resources for the entire state.
See the full Pennsylvania guide →Community intelligence
Live Sighting Map
See where SLF has been spotted near you in Clearfield County, PA. Add your own sighting to help map the front.
Open the Map →Free weekly fight briefing
Fight SLF in Clearfield County, PA.
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