Spotted Lanternfly inPrinceton, NJSPOTTED LANTERNFLY GUIDE
Princeton (Mercer County) was among the first well-documented NJ SLF establishment sites, confirmed in 2020. Princeton University campus and arboretum have been heavily affected, and the university runs an active SLF monitoring program. The D&R Canal State Park towpath functions as a major Tree of Heaven corridor connecting Princeton to the Delaware River and beyond.
Where it's showing up
Key Neighborhoods
Highest activity zones
SLF Hotspots
Princeton University campus/Faculty Road corridor
Active zone
D&R Canal towpath
Active zone
Princeton Battlefield State Park
Active zone
Institute for Advanced Study grounds
Active zone
Mountain Lakes Natural Area
Active zone
Primary SLF food source
Tree of Heaven in Princeton, NJ
The D&R Canal towpath is lined with Tree of Heaven running through central New Jersey — a prime SLF spread corridor connecting Princeton to Trenton and the Delaware River. Princeton University's Faculty Road corridor and the Institute for Advanced Study grounds have well-documented SLF populations. Mountain Lakes Natural Area provides additional TOH habitat supporting established SLF colonies.
Identify Tree of Heaven →Local action resources
What To Do in Princeton, NJ
Report a Sighting
Every sighting in Princeton, NJ maps the invasion front. Report directly to NJ 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 NJ State Guide
County-level data, quarantine zones, treatment guides, and agency resources for the entire state.
See the full NJ guide →Community intelligence
Live Sighting Map
See where SLF has been spotted near you in Princeton, NJ. Add your own sighting to help map the front.
Open the Map →Free weekly fight briefing
Fight SLF in Princeton, NJ.
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