Portland, Oregon · Family-owned since 1963
Ant Control in Portland, Oregon
A trail across the counter, ants around the dog bowl, a pile of sawdust under a window frame. You want your kitchen back. Our Portland technicians identify which ant you have, treat the colony the trail leads to, and come back free if they return.
- Pest plan from $39/mo plus a $260 setup fee
- Treatment matched to the ant species
- Free re-service between scheduled visits
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Same-day callback Monday to Friday for requests sent before 4pm.
Signs of an ant problem in a Portland home
A few ants after rain are common. These signs point to a colony that needs treatment.
Steady trails
Lines of ants along counters, baseboards or window sills that come back day after day.
Ants indoors in winter
Activity inside during cold months can mean a colony is living in or under the house.
Sawdust piles
Small piles of wood dust near window frames, baseboards or in the crawl space are a sign of carpenter ants.
Winged ants in spring
Carpenter ant nests release winged ants each spring. Winged ants inside can mean a nest in or near the house.
Why ants are so common in Portland
OSU Extension lists odorous house ants and pavement ants as the most common household ants in the Pacific Northwest. Ants come indoors looking for food and moisture, or to get away from extreme weather and flooded soil. Carpenter ants can nest in sound wood as well as damp wood, and moisture ants usually mean rotting wood somewhere in or under the house.
A trail on the counter makes a clean kitchen feel dirty, and it wears on you to spray, wipe and find a new trail the next morning. Store sprays kill the workers you can see while the colony keeps sending more. We identify the species first, because each one needs a different treatment.
How we handle ants in Portland
- 1
Identify the ant
Your technician checks the trails, nesting spots and moisture around the home to confirm which ant you have.
- 2
Treat the colony
We use baits and targeted treatments that workers carry back to the colony, add an exterior barrier where it helps, and point out the moisture, food and gaps that draw ants in.
- 3
Stay ahead of spring
Scheduled visits are timed before the spring surge. Re-service between visits is free.
is the peak month for new ant calls at Interstate Pest Management over the last 5 years.
of each year’s new ant calls arrive March through June.
for the All Seasons Pest Service, plus a $260 one-time setup fee.
What waiting costs
- Each new trail means the colony is still feeding in your home.
- Carpenter ants keep digging galleries in wood for as long as the nest is there.
- Moisture ants point to wet or rotting wood that gets worse until someone finds it.
What it looks like when ants are handled
A clean counter, a dog bowl with no ants around it and a spring you don’t spend wiping up trails.
Local Context: Oregon and Washington
When ants send Portland homeowners to the phone
Our records show when neighbors first call us about ants. Your plan visits are timed ahead of those months, so treatment is in place before you notice a problem.
Share of new first-time calls by month. Source: Interstate Pest Management service records, new customers’ first appointments over the last 5 years. Each row sums to 100%.
Ant control pricing in Portland
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, at no charge.
All Seasons Pest Service
$39/mo
$260 one-time setup fee
Year-round coverage for the insects Portland homes see most, including ants, spiders and wasps.
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 Portland customers say about ants
4.96 average from 8,394 Google reviews
“We have been using Interstate Pest since moving into our new home, dealing with Portland’s typical ant and other pest issues.”
“No more ants! Thank you Austin from Interstate Pest Management. They’re great to work with – every three months they send an email to let me know when they’re coming by for a follow up spray.”
“We had ants everywhere when we moved in, including our nightstands! Now we are ant free.”
Which ants do we see in Portland?
Photos, ID markers and biology for each one are in our Pest Library.
Portland ants questions
Still deciding? Our Portland office answers the phone Monday to Friday, 8am to 5pm.
How much does ant control cost in Portland?
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.
Why do ants keep coming back after I spray?
Store-bought sprays kill the ants you can see, but the colony keeps sending more. Our treatments target the colony, and if ants come back between scheduled visits, re-service is free.
How do I know if I have carpenter ants?
Large black ants indoors, winged ants in spring and small piles of wood dust near wood are common signs. Our technicians confirm the species during the inspection before treating.
When is ant season in Portland?
Over the last 5 years, new ant calls to Interstate Pest Management peaked in March, and more than half arrived between March and June.
What should I know about treatments with kids and pets at home?
We follow an Integrated Pest Management approach and use targeted baits and treatments. Your technician will tell you what was applied and when it is safe to use treated areas.
Call our Portland office
Interstate Pest Management
211 SE Madison St Ste 10
Portland, OR 97214
Monday to Friday, 8am to 5pm
Oregon Department of Agriculture License #AG-L0000148CPO
Ready for a home without ants?
A clean counter, a dog bowl with no ants around it and a spring you don’t spend wiping up trails. Plans start at $39/mo plus a one-time setup fee, with free re-service between scheduled visits.