Every list in Klaviyo has a unique list ID; as does every user, flow, campaign, etc. In this article, you will learn how to locate a specific list ID.
Find Your List ID
To find the list ID for an existing Klaviyo list, navigate to the Lists & Segments tab of your account and click on a particular list.
Then, click into the Settings tab. Here, you will find your list ID.
Additionally, you can find a list's ID in the URL in your browser when viewing this list. In the URL, you will see a short series of numbers and letters — this is the list ID.