← Iowa cannabis laws›Cannabis Possession Limits

Iowa Cannabis Possession Limits (2026)

Conditional: Cannabis possession is illegal in Iowa for anyone who is not a registered patient.

ConditionalVerified May 31, 2026

Cannabis laws change at state, county and city lines.Track them in the free LawLert iPhone app: it alerts you when you cross into a state where they differ, or into a city or county that bans cannabis sales where LawLert has the local rule, and when they change in your state. No account.Get the app

Cannabis possession is illegal in Iowa for anyone who is not a registered patient. Registered patients are capped at 4.5 grams of THC per 90 days, and a practitioner may authorize more for terminal or established patients.

Official source: hhs.iowa.gov →

General legal information, not legal advice — verify important decisions with a licensed attorney.

Cannabis Possession Limits in states bordering Iowa

The same rule in each neighboring state LawLert has verified, from that state’s own official source.

IllinoisPermitted
In Illinois, residents 21 and older may possess up to 30 grams of flower, 5 grams of concentrate, and 500 milligrams of THC in infused products, and non-residents may possess half those amounts.
Verified May 31, 2026 · Source: ilga.gov · Full Illinois rule →
MinnesotaPermitted
In Minnesota, adults 21 and older may possess in public up to 2 ounces of flower, 8 grams of concentrate, and edibles containing up to 800 milligrams of THC, and up to 2 pounds of flower at a private residence.
Verified May 31, 2026 · Source: revisor.mn.gov · Full Minnesota rule →
MissouriPermitted
In Missouri, adults 21 and older may possess up to 3 ounces of dried, processed marijuana, or the equivalent.
Verified May 31, 2026 · Source: health.mo.gov · Full Missouri rule →
NebraskaConditional
Recreational possession is illegal in Nebraska, though registered patients with a practitioner's certification may possess up to 5 ounces. A regulated supply was not yet available as of May 2026.
Verified May 31, 2026 · Source: lcc.nebraska.gov · Full Nebraska rule →
South DakotaConditional
In South Dakota, recreational possession by anyone who is not a registered patient is illegal and a misdemeanor. Registered patients may possess up to 3 ounces, plus allowable products per dosage.
Verified Aug 2, 2026 · Source: doh.sd.gov · Full South Dakota rule →
WisconsinRestricted
Possessing cannabis is illegal in Wisconsin, and a first offense is a misdemeanor punishable by up to 6 months in jail and a fine of up to $1,000. A second offense is a Class I felony.
Verified May 31, 2026 · Source: docs.legis.wisconsin.gov · Full Wisconsin rule →

Don't get caught off guardCross into a state where this law is different and the free iPhone app tells you what changed, even with the app closed. It also alerts you when a law you track changes where you live. No account.Get the free app

Track this law — get alerted when it changes

We watch the official sources behind Iowa cannabis rules. If a tracked rule changes, you get one short email — never more than one a week. Free, unsubscribe anytime.