Pennsylvania · Northeast

Tick risk in Delaware County, Pennsylvania

Delaware County covers 49 towns. Its CDC Lyme rate of 62 cases per 100,000 people a year ranks in the top 12% of U.S. counties for reported Lyme disease. CDC surveillance lists Deer tick, American dog tick, and Lone star tick as established here. Pick your town below for today's score, a 7-day outlook, and what's driving it.

Highest and lowest tick risk in Delaware County

Peak-season modeled risk. Tick risk is local, even within one county.

At the summer peak, tick risk across Delaware County runs from Nether Providence Township (high) at the high end to Marcus Hook Borough (low) at the low end. The difference is habitat: forest cover across the county ranges from 9% to 98%, and more forest and woodland edge means more places ticks can quest for a host.

Tick species in Delaware County

CDC county surveillance (established or reported)

Deer tickEstablished
American dog tickEstablished
Lone star tickEstablished
Gulf Coast tickNot established

Established in this county for the deer tick, the main Lyme carrier. “Not established” means no CDC surveillance record for Delaware County, not that a town is tick free. Source: CDC tick surveillance (ArboNET Tick Module), 2025.

Diseases found in local ticks

Lyme diseaseBabesiosisBorrelia miyamotoi (relapsing fever)

Pathogens detected in ticks tested from Delaware County (CDC tick-testing surveillance, 2025). This lists what has been found, not how common it is.

Tick control in Delaware County, PA

Professional tick control across Delaware County usually means a barrier treatment along the lawn edge, leaf litter, stone walls, and shady borders where ticks wait for a host, applied two to four times a season by a licensed pest control company. It is the single most effective way to cut tick numbers in the part of the yard your family actually uses, and it matters most in Delaware County's more wooded towns.

How much does tick control cost in Delaware County?

Most Delaware County homeowners pay about $100 to $200 per visit for professional tick spraying, or roughly $350 to $600 for a full season of barrier treatments, depending on lot size and how wooded the property is. Quotes are free, so it costs nothing to get a real number for your yard.

Get a free tick control quote

From a vetted local tick exterminator serving Delaware County. No cost, no obligation.

Common questions about ticks in Delaware County

Which towns in Delaware County have the highest tick risk?

At the summer peak, Nether Providence Township carries the highest modeled tick risk in Delaware County, followed by Upper Providence Township, Rutledge Borough, Rose Valley Borough, Swarthmore Borough. Risk tracks how wooded a town is: forest cover across Delaware County ranges from 9% to 98%, and the more forest and woodland edge a town has, the more habitat ticks have to quest from. Marcus Hook Borough sits at the low end. Every town has its own daily score, so check the one nearest you.

What ticks live in Delaware County?

CDC surveillance records 3 established tick species in Delaware County: Deer tick, American dog tick, Lone star tick. The blacklegged (deer) tick is the main carrier of Lyme disease in the Northeast. "Not established" for a species means there is no CDC surveillance record for the county, not that the tick is absent.

Is Lyme disease common in Delaware County?

Delaware County reports about 62 Lyme cases per 100,000 people a year (U.S. CDC), in the top 12% of U.S. counties for reported Lyme disease (the 60th-highest of Pennsylvania's 67 counties). Lyme is the dominant blacklegged-tick disease, so TickZone uses this county rate as the disease baseline behind every town's score.

All towns in Delaware County

Tick risk is local. Pick the town nearest you.