Olympia, Washington · Family-owned since 1963
Ant Control in Olympia, Washington
A line of tiny ants from the window to the sugar bowl, ants in the dishwasher, big black ants on the deck in May. You want to stop setting out bait cups. Our Olympia technicians identify which ant you have, treat the nest the trail leads back to and come back as part of your plan if they return.
- Pest plan from $39/mo plus a $260 setup fee
- Treatment matched to the ant species
- Re-services included as needed between scheduled visits
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Same-day callback Monday to Friday for requests sent before 4pm.
Signs of an ant problem in an Olympia home
A stray ant in summer is normal. These signs mean a colony has moved in or close by.
Afternoon trails
WSU says odorous house ant trails are easiest to see after noon, running from a gap to food or water.
Ants in the sweets
Small dark ants in the sugar, juice, pastries or the pet bowl, and back again after you wipe them up.
Swarms in spring
Large winged ants indoors from April to early June can mean a carpenter ant nest nearby.
Wood shavings
Coarse sawdust under a window frame, a deck board or a beauty bark bed by the foundation.
Why ant calls run from March to August
In Interstate Pest Management records for new customers in Thurston, Lewis and Mason counties over the last five years, ants were on 37% of first visits, and 83% of the year’s new ant calls came March through August. Calls drop off fast once the October rain is back. WSU calls odorous house ants perhaps the most difficult ants in our area to discourage, because their shallow nests move often.
Carpenter ants are the other big one. WSU says their mating swarms generally occur from April to early June, that the main nest is usually outdoors in a stump or log, and that many home infestations are satellite nests. In iNaturalist records for Thurston and Lewis counties over the last five years, 61% of carpenter ant sightings came in May and June.
How we handle ants in Olympia
- 1
Identify the ant
Your technician follows the trail, checks nesting spots by the foundation and looks for moisture to confirm which ant you have.
- 2
Treat the nest, not the trail
We place baits the workers carry home so the treatment reaches the nest you can’t see. For carpenter ants we look for the parent nest outdoors and the wet wood they are using, and show you what to fix.
- 3
Stay ahead of spring
Your scheduled visits land before the March ant surge. If a trail shows up between visits, re-service is included in your plan.
of new ant calls in our Thurston, Lewis and Mason County records over the last five years came March through August.
of carpenter ant sightings in Thurston and Lewis counties over the last five years were logged in May and June.
for the All Seasons Pest Service, plus a $260 one-time setup fee.
What waiting costs
- A trail that finds food once comes back to it every warm afternoon.
- Carpenter ant satellite nests keep growing as long as the parent nest outdoors is there.
- Wet wood that drew carpenter ants in keeps getting softer.
What it looks like when ants are handled
A clean counter through a sunny week, a dishwasher without ants and a spring you don’t spend chasing trails.
Local Context: Olympia and the South Sound
When ants send South Sound homeowners to the phone
Our records show the month each new customer in Thurston, Lewis and Mason counties first called us about ants, over five years. Your plan visits are set ahead of the busy months, so ants find a treated house when they arrive.
Share of new first-time calls by month. Source: Interstate Pest Management service records, first appointments of new customers with Thurston, Lewis and Mason County billing addresses over the last five years. Each row sums to about 100%.
Ant control pricing in Olympia
Every plan has one monthly price and a one-time setup fee for the first treatment. If pests come back between scheduled visits, so do we, and the visit is included in your plan.
All Seasons Pest Service
$39/mo
$260 one-time setup fee
Year-round coverage for the insects Olympia homes see most, including ants, spiders, wasps and boxelder bugs.
See the Pest planAll Seasons Pest & Rodent Service
$47/mo
$280 one-time setup fee
Everything in the Pest plan plus rats and mice, on one bill.
See the Pest & Rodent planAll Seasons Rodent Service
$39/mo
$280 one-time setup fee
Ongoing rat and mouse control for homes that need rodent coverage only.
See the Rodent planOne-time Rodent Service: no plan, $350 for the first visit, then $60 per follow-up.
Exclusion work is quoted separately and carries a 1-year warranty on materials.
What our customers say about ants
4.96 average from 8,394 Google reviews
“Caleb was great at explaining the treatment process, what to do if we see more carpenter ants and the option to spray for other bugs such as spiders. I appreciated learning they are beneficial and decided not to spray them. He was thorough and friendly.”
“Super responsive and dealt with our ant invasion immediately. Great knowledgeable staff who work with confidence.”
“The techs are always courteous & usually ahead of schedule. The call for permission to give earlier access and always go above & beyond to get rid of my pesky ants.”
Which ants do we see in Olympia?
Our Pest Library has photos and ID tips for each one, reviewed by our entomologist.
Olympia ants questions
Still deciding? Our Olympia office answers the phone Monday to Friday, 8am to 5pm.
How much does ant control cost in Olympia?
Ants are covered by the All Seasons Pest Service at $39/mo with a $260 one-time setup fee. If you also need rats and mice covered, the All Seasons Pest & Rodent Service is $47/mo with a $280 setup fee.
When is ant season in Olympia?
March through August. In Interstate Pest Management records for new customers in Thurston, Lewis and Mason counties over the last five years, 83% of new ant calls came in those six months.
What are the tiny ants in my kitchen?
Most small dark ants in Olympia kitchens turn out to be odorous house ants. WSU puts the workers at about 1/16 inch. They like sweets, dairy and juice, and smell like rotten coconut when crushed.
How do I know if I have carpenter ants?
Look for large black or red-and-black ants indoors, winged ants from April to early June, and coarse sawdust near wood. We confirm the species before treating.
Why do ants keep coming back after I spray?
Spray only reaches the ants you can see, and the nest keeps sending more. Baits the workers carry home reach the nest. If ants come back between scheduled visits, re-service is included in your plan.
Is treatment okay with kids and pets at home?
We use an Integrated Pest Management approach: baits and targeted treatments instead of blanket spraying, the same inspection-first approach Thurston County uses for its own properties. Your technician tells you where each treatment went and when kids and pets can be back in that area.
Call our Olympia office
Interstate Pest Management
1107 Eastside St SE Ste E
Olympia, WA 98501
Monday to Friday, 8am to 5pm
Washington State Department of Agriculture License #229
Ready for a home without ants?
A clean counter through a sunny week, a dishwasher without ants and a spring you don’t spend chasing trails. Plans start at $39/mo plus a one-time setup fee, with re-services included as needed between scheduled visits.