A
A A
January 17, 2026
5.0
Max was amazing! 10/10 would recommend Key and MAX to anyone looking for excellent customer service!!
RecreationalMedical$$
Key Cannabis Dispensary O'Fallon
4.6(538)
Key Cannabis Dispensary in O'Fallon, MO offers a wide selection of premium cannabis products including flower, extracts, edibles, and gear. With a friendly staff and convenient options for online ordering, in-store pickup, and drive-thru service, they cater to both medical and recreational users.
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6700 State Route N
Saint Charles, MO 63304
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$$ · Recreational & Medical
Save ~6%/yr with a Missouri medical card
Medical patients skip recreational taxes, get higher purchase limits, and can shop at age 18+. Most people get approved online in about 20 minutes.
Products & Menu
FlowerPre-RollsVapesEdiblesConcentratesAccessories
THC:10%–30%
CBD:0%–20%
🏷️ Deals & Discounts
First-Time Deal
Features & Amenities
Experience
💻Online Ordering🚗Drive-Thru
Atmosphere
⚡Fast & Efficient
Fulfillment
🚚Delivery🅿️Curbside Pickup🏪In-Store
Payment
💵Cash💳Debit🏧ATM On-Site
Medical
🏥Accepts Medical Card
Shopper Type
🌱Beginner-Friendly💬Budtender Recs
Access
🅿️Parking♿Wheelchair Accessible
Deals & Discounts
🎁First-Time Deal
Hours
Monday8:00 AM – 9:45 PM
Tuesday8:00 AM – 9:45 PM
Wednesday8:00 AM – 9:45 PM
Thursday8:00 AM – 9:45 PM
Friday8:00 AM – 9:45 PM
Saturday8:00 AM – 9:45 PM
Sunday(Today)8:00 AM – 9:45 PM
Reviews (538)
4.6
4.6
538 reviews
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Angela Johns
January 16, 2026
5.0
Multiple visits to this dispensary. It is conveniently located and everyone that I have come into contact with here is always so cheerful and kind. Extremely helpful with selections, pricing, add ons, and sales. Its becoming one of my favorites! Thanks for always taking such great care of me!
J
John
December 6, 2025
5.0
Amanda was very welcoming. It was clear to me that I didnt know what the heck I was doing. She was awesome. Made me feel very comfortable while explaining choices.
G
Greggers Grunderson
October 23, 2025
5.0
Brendon G at Key dispensary was awesome. I am an old dude new to cannabis, and he answered all my newb questions about terpenes and aroma and everything else. Highly recommended.
N
Nikki Heinz
April 1, 2024
5.0
I love this place! I love the way its ran, I love the employees, and I love that they don't price gauge products like some other places in the area. Everytime I go in here they are smiling, and welcoming. They are also knowledgeable and willing to answer questions so you are getting the best product for your needs. Today I had the pleasure of meeting Sean at the Ofallon location. Great experience, had a little chat and he was amazing all the way through. Thank you all for being amazing. I appreciate you.
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Frequently Asked Questions About Key Cannabis Dispensary O'Fallon
Can tourists buy from Key Cannabis Dispensary O'Fallon?
Tourists 21+ can purchase recreational cannabis with valid ID. Key Cannabis Dispensary O'Fallon is a recreational & medical dispensary, so no medical card is needed for adult-use purchases.
How much can you buy at Key Cannabis Dispensary O'Fallon?
In Missouri, recreational customers can purchase up to 3 oz of flower per transaction. Key Cannabis Dispensary O'Fallon may have additional product-specific limits — check with the dispensary for details.
Is Key Cannabis Dispensary O'Fallon cash only?
Key Cannabis Dispensary O'Fallon accepts cash as well as Debit, ATM On-Site. An ATM is available on-site.
Does Key Cannabis Dispensary O'Fallon offer delivery?
Yes, Key Cannabis Dispensary O'Fallon offers delivery. Cannabis delivery is legal in Missouri. Check the dispensary's website for delivery areas and minimum order requirements.
What are Key Cannabis Dispensary O'Fallon's hours?
Key Cannabis Dispensary O'Fallon is located at 6700 State Route N, Saint Charles, MO 63304. The dispensary is open 7 days a week. Hours vary by day — check the hours section above for today's schedule.
Get Your Missouri Medical Card Online
Medical patients in Missouri save ~6% on cannabis purchases, get higher purchase limits, and access dispensaries at age 18+. Most patients can get approved online in about 20 minutes.
✓ Board-certified physicians · ✓ 4.8★ rated · ✓ 500,000+ patients approved
Get My Missouri Medical CardOther Dispensaries in Saint Charles
Cannabis Laws in Missouri
Last updated January 15, 2026
Missouri legalized recreational cannabis in November 2022 through Amendment 3, with recreational sales beginning February 3, 2023. Adults 21+ can purchase from licensed dispensaries. Missouri also expunged past cannabis convictions as part of the amendment. Medical cannabis has been available since 2018.
Minimum Age
Recreational: 21+
Medical: 18+
Purchase Limits
Rec: 3 oz of flower per transaction
Med: 6 oz per month
Public Consumption
Prohibited in public places. Only allowed on private property with owner permission.
Home Growing
Medical patients may grow up to 6 flowering, 6 vegetative, and 6 clones/seedlings. Recreational home growing is allowed for adults 21+ with a personal cultivation license ($100).
Delivery
Allowed
Tax Info
Recreational: 6% state excise tax plus 4.225% state sales tax plus local taxes. Medical: 4% state tax.
Visitor & Tourist Rules
Tourists 21+ can purchase recreational cannabis with valid ID.
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Disclaimer: Cannabis laws change frequently. This information was last updated on January 15, 2026. Always verify current laws with official state sources before making any decisions. This guide is for informational purposes only and does not constitute legal advice.