When does tick season start and end in Maryland?

In Maryland, ticks are active whenever the ground is not frozen, roughly March through November. Nymph deer ticks peak in June and July and cause most Lyme cases, and adult ticks have a second peak in the fall. On any winter day above freezing, adult ticks can still bite.

When is flea and tick season?

Flea and tick season generally runs from early spring through late fall, peaking in the warm summer months. In Maryland, start prevention for pets and people in March and keep it up through November, since ticks can bite on any mild day.

Which tick carries Lyme disease in Maryland?

The deer tick, also called the blacklegged tick, is the tick that spreads Lyme disease in Maryland. The American dog tick and lone star tick do not carry Lyme.

Maryland tick risk, by town

A daily tick-risk score for all 157 Maryland towns, grouped by their 22 counties. Tick risk is local, so pick your town for today's number, a 7-day outlook, and what's driving it.

What types of ticks live in Maryland? See the identification chart →

Allegany County · 7 towns · 195/100k Lyme

Anne Arundel County · 2 towns · 24/100k Lyme

Baltimore city County · 1 towns · 14/100k Lyme

Baltimore

Calvert County · 2 towns · 40/100k Lyme

Caroline County · 9 towns · 31/100k Lyme

Carroll County · 8 towns · 119/100k Lyme

Cecil County · 8 towns · 78/100k Lyme

Charles County · 3 towns · 21/100k Lyme

Dorchester County · 9 towns · 24/100k Lyme

Frederick County · 11 towns · 68/100k Lyme

Garrett County · 8 towns · 301/100k Lyme

Harford County · 3 towns · 46/100k Lyme

Kent County · 5 towns · 106/100k Lyme

Montgomery County · 19 towns · 21/100k Lyme

Prince George's County · 27 towns · 6/100k Lyme

Queen Anne's County · 7 towns · 59/100k Lyme

Somerset County · 2 towns · 30/100k Lyme

St. Mary's County · 1 towns · 43/100k Lyme

Leonardtown

Talbot County · 4 towns · 42/100k Lyme

Washington County · 9 towns · 69/100k Lyme

Wicomico County · 8 towns · 28/100k Lyme

Worcester County · 4 towns · 48/100k Lyme

Maryland tick questions

What types of ticks live in Maryland?: Maryland has the deer tick (blacklegged tick), which carries Lyme disease; the American dog tick; and the lone star tick, which is established in the state and causes alpha-gal syndrome. See the Maryland tick identification chart for photos and how to tell them apart.
When does tick season start and end in Maryland?: In Maryland, ticks are active whenever the ground is not frozen, roughly March through November. Nymph deer ticks peak in June and July and cause most Lyme cases, and adult ticks have a second peak in the fall. On any winter day above freezing, adult ticks can still bite.
When is flea and tick season?: Flea and tick season generally runs from early spring through late fall, peaking in the warm summer months. In Maryland, start prevention for pets and people in March and keep it up through November, since ticks can bite on any mild day.
Which tick carries Lyme disease in Maryland?: The deer tick, also called the blacklegged tick, is the tick that spreads Lyme disease in Maryland. The American dog tick and lone star tick do not carry Lyme.