You can typically find Stag Beer at major grocery chains and discount retailers within its core Midwestern markets:

Stag Beer | 12 pack of 12 oz Bottle - Binny's Beverage Depot

Stag Beer is primarily a hyper-regional brand with its strongest availability in and the St. Louis, Missouri area. While it was once sold in 22 states, its footprint has shrunk, making it harder to find outside the Midwest. Where to Buy In-Store