TickZone

Tick risk in St. Louis County, Missouri

St. Louis County covers 87 towns. CDC reports too few cases here to publish a county Lyme rate, but each town still has a daily score built from local weather, habitat, and season. Pick your town below for today's reading.

Highest and lowest tick risk in St. Louis County

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

At the summer peak, tick risk across St. Louis County runs from Westwood (moderate) at the high end to Champ (low) at the low end. The difference is habitat: forest cover across the county ranges from 20% to 85%, and more forest and woodland edge means more places ticks can quest for a host.

Tick species in St. Louis 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 St. Louis 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 St. Louis 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 St. Louis County, MO

Professional tick control across St. Louis 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 St. Louis County's more wooded towns.

How much does tick control cost in St. Louis County?

Most St. Louis 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 St. Louis County. No cost, no obligation.

Common questions about ticks in St. Louis County

Which towns in St. Louis County have the highest tick risk?

At the summer peak, Westwood carries the highest modeled tick risk in St. Louis County, followed by Calverton Park, Hanley Hills, Wildwood, Glendale. Risk tracks how wooded a town is: forest cover across St. Louis County ranges from 20% to 85%, and the more forest and woodland edge a town has, the more habitat ticks have to quest from. Champ sits at the low end. Every town has its own daily score, so check the one nearest you.

What ticks live in St. Louis County?

CDC surveillance records 3 established tick species in St. Louis County: Deer tick, American dog tick, Lone star tick. The lone star tick is the tick most responsible for human bites here, and its bite causes alpha-gal syndrome; the blacklegged (deer) tick, the main Lyme carrier, is a minor factor this far south. "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 St. Louis County?

CDC reports too few cases in St. Louis County to publish a stable county Lyme rate, which is common in rural or low-population counties, and typical this far south. That does not mean the risk is zero: the lone star tick, not Lyme, is the bigger local concern.

Does St. Louis County have lone star ticks that cause alpha-gal syndrome?

Yes. The lone star tick is established in St. Louis County and is the tick most responsible for human bites in the county. Its bite can trigger alpha-gal syndrome, a delayed allergy to red meat and other mammal products, along with ehrlichiosis and STARI. Learn the symptoms and what foods to avoid.

All towns in St. Louis County

Tick risk is local. Pick the town nearest you.