Tick risk in Harford County, Maryland
Harford County covers 3 towns and carries the 10th-highest tick-borne-disease baseline of Maryland's 22 counties, with a Lyme rate of 46 cases per 100,000 people a year (83rd of 1378 counties in the South). CDC surveillance lists Deer 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 Harford County
Peak-season modeled risk. Tick risk is local, even within one county.
At the summer peak, tick risk across Harford County runs from Bel Air (moderate) at the high end to Havre de Grace (moderate) at the low end. The difference is habitat: forest cover across the county ranges from 50% to 53%, and more forest and woodland edge means more places ticks can quest for a host.
- Bel AirModerate risk
- AberdeenModerate risk
- Havre de GraceModerate risk
Tick species in Harford County
CDC county surveillance (established or reported)
- Deer tickEstablished
- American dog tickReported
- Lone star tickEstablished
- Gulf Coast tickReported
Established in this county for the deer tick, the main Lyme carrier. “Not established” means no CDC surveillance record for Harford County, not that a town is tick free. Source: CDC tick surveillance (ArboNET Tick Module), 2025.
Diseases found in local ticks
No CDC tick-testing records for Harford County. That is a surveillance gap, not a sign these diseases are absent. Lyme and other tickborne illnesses occur across the region.
Tick control in Harford County, MD
Professional tick control across Harford 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 Harford County's more wooded towns.
How much does tick control cost in Harford County?
Most Harford 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.
From a vetted local tick exterminator serving Harford County. No cost, no obligation.
Common questions about ticks in Harford County
Which towns in Harford County have the highest tick risk?
At the summer peak, Bel Air carries the highest modeled tick risk in Harford County, followed by Aberdeen, Havre de Grace. Risk tracks how wooded a town is: forest cover across Harford County ranges from 50% to 53%, and the more forest and woodland edge a town has, the more habitat ticks have to quest from. Havre de Grace sits at the low end. Every town has its own daily score, so check the one nearest you.
What ticks live in Harford County?
CDC surveillance records 2 established tick species in Harford County: Deer 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 Harford County?
Harford County reports about 46 Lyme cases per 100,000 people a year (U.S. CDC), the 83rd-highest of 1378 counties in the South and the 10th-highest of Maryland's 22 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 Harford County
Tick risk is local. Pick the town nearest you.