Swapping the owner of a Steam group isn’t built into the system, but there’s a simple work around for us.
A short warning
The user whom you want to transfer ownership needs to be a premium (paid) Steam user so that they can own the group, otherwise this method will not work. If the person can add you, then they’re premium.
Swapping the ownership
- First, hit ‘Manage group members’ under ‘admin tools’ in the group.
- Demote everyone but the recipient of the group to a member by clicking on the star icon until they are all black.
- Your group member section should now appear like this, with the only other administrator being the intended new owner:4. Press the ‘Leave group’ button the right sidebar’.
And you’re done! You can now join back and there should be a new group owner.