Hello @HospicePBCF ,
At this time, folders are not available for contact lists. Generally speaking, customers will label lists with similar names, such as Monday Email: General Audience, Monday Email: Seniors, Monday Email: Parents, etc. These can be easily searched based on common terms, while in the Contacts screen, as well as when sending your emails.
For voting on, voicing of use cases, and additional info regarding this feature request, I'd advise checking out this Feedback thread.
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