Wis. Stat. § 118.175: Pupils without parents or guardians; report required.

(1) This section does not apply to a pupil who has a legal custodian, as defined in s. 48.02 (11) or 938.02 (11), or who is cared for by a kinship care provider, as defined in s. 48.57 (3m) (a) 2.

(2) If a pupil is a child who is without a parent or guardian, any school teacher, school administrator, school counselor or school social worker who knows that the child is without a parent or guardian shall report that fact as soon as possible to the county department under s. 46.22 or 46.23 or, in a county having a population of 750,000 or more, to the department of health services.