Minors – Age of Majority – Illinois

A minor is a person who has not attained the age of 18 years. A person who has attained the age of 18 years is of legal age for all purposes except as otherwise provided in the Illinois Uniform Transfers to Minors Act.

Chap. 755, Act 5, Art. XI, Sec. 11-1

Age of Majority
18, common law

Emancipation
Minors between 16 and 18 may apply if no parental objection (§§750 ILCS 30/1, et seq.)

Contracts
Voidable unless for necessities; executing contract binding only if ratified after 18; executed contract binding unless disaffirmed within reasonable time after age 18; common law

Ability to Sue
Guardian ad litem must be appointed or can sue within 2 years of turning 18 (§735 ILCS 5/13-211)

Consent to Medical Treatment
Consent by minor if married, parent, or victim of sexual assault (410 ILCS 210/1, et seq.