Harvard Square Oktoberfest is a lively street festival in Harvard Square, Cambridge, that celebrates Oktoberfest with German and craft beers, seasonal food, live music, and family-friendly entertainment. The event transforms the plaza and surrounding streets into vendor-lined beer gardens and performance areas featuring local restaurants, artisans, and cultural programming. Organized by the Harvard Square business community, it draws residents and visitors from across the Boston area for a day of food, drink, and entertainment.