Welcome to Key Cannabis Dispensary in O’Fallon, MO! Take advantage of our convenient drive-thru and online ordering for easy access to top-quality cannabis products. Located on State Road North off exit 364 from Hwy K, we proudly serve O’Fallon with a comprehensive selection of medical and recreational cannabis. Our inventory includes a wide variety of cannabis strains, pre-rolls, vapes & carts, concentrates, edibles, tinctures, CBD, and more.