Costco sometimes carries 24-count cases of the Wiesn variety.

You can find Paulaner Oktoberfest at these major retailers and platforms:

Services like Instacart , Uber Eats , and Drizly (via GoToLiquorStore) can deliver it from local shops near you. Review: Festbier vs. Märzen Oktoberfest Bier | Paulaner Brauerei - BeerAdvocate

Many locations of Total Wine & More and BevMo! regularly stock both varieties.

Paulaner actually brews two different Oktoberfest beers, and knowing the difference is key to getting the one you want. Most major liquor stores and grocery chains carry at least one of them during the late summer and fall seasons. Where to Buy