How to Hide Your Instagram Follower List
By default, Instagram keeps your followers and following lists visible to everyone. However, for privacy reasons, you may want to hide these lists from other users. Here's how, step by step:
Making Your Account Private
The most reliable solution is to make your account fully private: go to your profile → tap the ☰ menu in the top right → Settings and Privacy → Account Privacy → turn on "Private Account". This way, only followers you approve can see your profile, posts, and follower list.
Can You Keep the Account Public but Hide Only the Lists?
Instagram currently has no official setting that keeps an account public while hiding only the follower/following list. The only guaranteed way to hide the list is to switch to a private account. Some third-party apps claim to offer this feature, but for the safety of your account we don't recommend giving your Instagram login to apps outside of Instagram.
Hiding It From Specific People
If you want to keep your account public but prevent certain people from seeing your list, you can block them or use the "Restrict" feature. Blocked users cannot see your profile or your lists.
Summary
The only permanent, official way to hide your follower list is switching to a private account. If you want privacy from specific people only, blocking or restricting is the way to go.