Age Requirements:
18 vs. 21 for Firearm Purchases

Illinois uses a two-tier age system for firearm ownership that is rooted in the FOID Act (430 ILCS 65). The dividing line between age 18 and age 21 determines not only who may possess firearms but also what additional requirements apply to younger gun owners. Understanding these thresholds is critical for anyone purchasing a firearm in the state.^[1]

21 and Older: Standard FOID Eligibility

Any Illinois resident who is at least 21 years old may apply for a Firearm Owners Identification (FOID) card on their own, provided they meet all other eligibility criteria. These criteria include having no felony convictions, no domestic violence convictions, no active orders of protection, no recent assault or battery convictions within the past five years, no involuntary mental health commitments within the past five years, and no adjudication as mentally defective. A 21-year-old applicant does not need parental consent or sponsorship of any kind.^[2]

18 to 20: Parental Consent Required

Persons between 18 and 20 years old may obtain a FOID card, but only with the written consent of a parent or legal guardian. The sponsoring parent or guardian must themselves hold a valid FOID card and must not be disqualified from firearm possession under state or federal law. The parent or guardian assumes legal responsibility for the minor's possession of firearms by signing the consent form. If the parent's or guardian's FOID card is later revoked, the sponsored minor's FOID card is also subject to revocation.^[3]

This parental sponsorship requirement is unique to Illinois. Most states that set a minimum age for firearm possession do not require an affirmative act by a parent or guardian beyond general consent. In Illinois, the parent must complete and submit documentation to the ISP, creating a formal record of sponsorship that ties the minor's FOID eligibility directly to the parent's own legal status.

Under 18: No FOID Eligibility

Persons under 18 years of age cannot obtain a FOID card under any circumstances. Without a FOID card, a person cannot legally possess a firearm or ammunition in Illinois. Narrow exceptions exist for minors who are under the direct supervision of a FOID-holding adult for specific activities such as target shooting, hunting, or firearms safety instruction, but these exceptions do not permit independent possession.^[4]

Federal Age Overlay

Federal law adds a second layer of age restrictions that applies in parallel with Illinois law. Under 18 U.S.C. 922(b), a federally licensed dealer may not sell a handgun to any person under 21 or a long gun (rifle or shotgun) to any person under 18. This means that even an 18-year-old with a valid FOID card and parental consent cannot purchase a handgun from a dealer -- federal law prohibits the sale. Private transfers of handguns to persons 18-20 may be permissible under federal law, but the buyer must still hold a valid Illinois FOID card.^[5]

Concealed Carry: 21 Only

The Firearm Concealed Carry Act (430 ILCS 66) sets an absolute minimum age of 21 for a Concealed Carry License. There is no parental consent exception for concealed carry. A person between 18 and 20 may possess a firearm at home or transport it in compliance with state law, but they cannot carry a concealed firearm on their person in public.^[6]

Practical Impact for Young Buyers

The combined effect of state and federal age requirements creates a tiered system. An 18-year-old Illinoisan with parental consent can obtain a FOID card and purchase long guns from a dealer or any firearm through a private sale (with FOID verification). A 21-year-old can apply independently for a FOID card, purchase any firearm from a dealer, and apply for a concealed carry license. The gap between 18 and 21 represents a period of significantly limited access, particularly for handgun purchases through licensed dealers.

See also: FOID Automatic Renewal and Fingerprint Submission

See also: Universal Background Checks for Private Sales