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How to Get Rid of Ants in the Mailbox

graphic ant in a photo of a mailbox
Written By: Heidi Stonehill Executive Editor
Almanac Guide to Herbs

Discovering ants in your mailbox can be an unpleasant surprise. A few weeks ago, I opened my mailbox and found dozens of black ants caring for a nursery of eggs. After searching for solutions and trying several methods, I was able to get rid of the ants—and they haven’t returned.

Why Are There Ants in My Mailbox?

Although it may seem like an odd place for insects to set up housekeeping, a mailbox can be an attractive nesting spot for ants. Mailboxes provide shelter from rain and wind, and the enclosed space warms up quickly in the sun, creating a cozy environment for raising young.

Some species of ants are constantly searching for protected locations to establish new colonies. A mailbox mounted on a post offers plenty of hiding places and is usually disturbed only once a day when the mail arrives. In my case, the ants had even created a nursery for their cream-colored eggs inside the box.

Food residue isn’t always necessary to attract ants. They may simply be looking for a safe, dry place to live. Nearby plants, mulch, trees, or ant colonies in the yard can also make your mailbox an appealing destination.

What Worked For Me

Thank goodness for the Internet! I quickly scanned the Web to see if anyone else had this trouble, and sure enough, quite a few people did. They had recommended some courses of action, and I tried several, just in case. Whether it was one method in particular or the combination of all that did the trick, the ants have not returned.

How to Get Rid of Ants in the Mailbox

In case you ever have this happen to you, here is what worked for me:

  1. Clear out the ant nursery (Not a pleasant task. I felt sorry for the ants, but it had to be done).
  2. Wash the interior and outside of the mailbox, and upper part of post, with a liquid disinfectant.
  3. Wash with vinegar.
  4. Wash with soap and water (I used liquid hand soap).
  5. Place a fabric softener sheet inside the box, over any entrance holes (The mail certainly smelled fragrant the first day, but the scent faded after that).

Have you had an experience with ants in the mailbox? Share your tips with readers in the Reader Comments section below. Thank you!

Garden Pests
About The Author
Heidi Stonehill

Heidi Stonehill

Executive Editor

Heidi Stonehill is the Executive Editor for The Old Farmer’s Almanac, joining the team in 2001. As such, she manages the content development of the Almanac’s line of wall, engagement, box, and special...
Read More from Heidi Stonehill

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Comments

<span>Joe Doutt</span> Fri, 05/09/2025 - 13:46
For ants in mail box : throw 1/2 a handful of “ Virgin shredded Cedar Mulch “ in your mailbox & leave it in there . Every couple weeks remove & refresh the mulch . I haven’t had any ants in my mailbox for a couple years !
<span>Sherrie Stephenson</span> Wed, 05/07/2025 - 10:51
I have used corn meal to get rid of ants in an area. It seems to kill the whole nest so I would have cleaned out the mailbox and put cornmeal at the base of the post holding it. The corn meal isn't harmful to anything else so is safe to use and cheap.
<span>Alby Ellis</span> Tue, 05/06/2025 - 19:12
When ever I see lots of ants anywhere I sprinkle chap talcum powder at the source of the trail and ants disappear very quickly. May have to do two sprinkles. But ants are not seen for a long time. Works every time
<span>Cb</span> Tue, 05/06/2025 - 15:26
Leave it to a boy....my son lit a few firecrackers inside. He had a mess to clean up, but no more ants! So far.
<span>Kate</span> Tue, 05/06/2025 - 07:29
Fabric softener sheet worked so far. Didn't use vinegar but did clean out the nest
<span>Elssa Green</span> Tue, 05/06/2025 - 07:07
Simply leave the mailbox open and they will remove their own nursery. Might have to do it twice before they are convinced.
<span>Kate Jiggins</span> Mon, 05/13/2024 - 16:00
Just read online that all you have to do is expose them to light and they will move their eggs elsewhere - they want a dark spot. Saves you from killing them.
<span>Katie</span> Wed, 05/15/2024 - 08:10
That method normally works for us, but it has not worked this year, they keep returning after the mail courier puts new mail in & closes it again. I am going to try this method after they clear out from the open door in hopes that they don't return AGAIN.
<span>Melin</span> Thu, 05/15/2025 - 18:20
Our mail courier was closing our box as well and when I asked him not to he suggested fabric softener sheets. They work like a charm. I found some fabric softener sheets work while others do not (Bounce Pet sheets do not work for more than a week. Although I wonder if it was the rain that deactivated them?) The very pricey Laundry Sauce sheets worked very well for weeks. We happened to have some, otherwise I wouldn't buy them for the mailbox. :)
<span>Cb</span> Tue, 05/06/2025 - 15:27
Leave a note for the mail person....unless, by law, they're required to close the box.....