How can I get rid of ants around the kitchen sink?

https://www.doityourself.com/stry/how-to-get-rid-of-ants-in-drains

You may have to call in a pest control person depending on the kind of ants. But to keep them out of your house, use white chalk. They won't cross over it.

We were the same way, nothing worked to get rid of the ants. Then an old timer told us about corn meal. It kills the ant colony because they cannot digest it. We use Jiffy as it is sweet and they really eat it up fast. Sprinkle it liberally where you see a trail or find their mound for best results. If the corn meal is gone and you see any ants, put out a second application. It just means they are a huge colony. I have never had to put out more than 2 applications anywhere. This works for any kind of ant. It is inexpensive, safe for animals, children and the environment and best of all it WORKS

Great idea Leonora Lynn, the cornmeal.

To get rid of out ants we used a product named Terro, boric acid in a liquid form. Put it where they make a trail (drops on a shiny piece of cardboard), they stop and eat it carrying it back to the colony. You can find it in the DIY stores.

Put some sticks of Spearmint gum in the paths of the ants.

Product Description:

To kill common household ants, simply place the pre-filled, ready-to-use liquid ant bait stations near indoor areas where ants are spotted. TERRO® Liquid Ant Baits are specifically designed to allow worker ants to consume the product and survive long enough to carry the liquid back to the nest and deliver a dose to the rest of the colony. Complete control may take up to two weeks.

The liquid ant bait stations prevent the bait from drying out and provide the ants with a continuous supply of liquid, day and night.

How Does It Work?

This is a bait product, so initially you’re going to see more ants — lots more. Here’s why — as ant foragers look for food, they are attracted to the sweet liquid ant bait. Once foraging worker ants find the liquid ant bait, they consume it and drop what is called a ‘pheromone trail’ back to the nest that lets all the other worker ants know where a food supply has been found. This is why you will initially see more ants when using the liquid ant baits.

While the active ingredient in the TERRO® Liquid Ant Baits will ultimately kill the worker ant, it sneakily interferes with the ant's digestive system and works slowly enough that the worker has time to get back and share the ant bait with the rest of the colony.

Geew is right Terro is the best. Just be careful to make sure kids and pets don't get into it.