Minors – Age of Majority – Wisconsin

In the construction of Wisconsin laws the words and phrases which follow shall be construed as indicated unless such construction would produce a result inconsistent with the manifest intent of the legislature:

Adult. “Adult” means a person who has attained the age of 18 years, except that for purposes of investigating or prosecuting a person who is alleged to have violated any state or federal criminal law or any civil law or municipal ordinance, “adult” means a person who has attained the age of 17 years.

Minor. “Minor” means a person who has not attained the age of 18 years, except that for purposes of investigating or prosecuting a person who is alleged to have violated a state or federal criminal law or any civil law or municipal ordinance, “minor” does not include a person who has attained the age of 17 years.

Chap. 990, §990.01(3), (20)

Age of Majority
18 (§990.01(3))

Emancipation
By marriage unless incompetent (880.04(1))

Contracts
Valid only for necessaries; necessaries contracts not valid if no implied or express provision for payment exists; contract made by infant may be ratified by acts or words after reaching age of majority (common law)

Ability to Sue
By guardian or guardian ad litem (803.01(3))

Consent to Medical Treatment
Not specified