Diner 21 is a classic New Haven diner located at 211 Washington Avenue, offering traditional American comfort food like burgers, pancakes, and fried chicken. They specialize in locally sourced ingredients and a cozy, nostalgic atmosphere.
Operator computes a Business Health Score every night at 2 am HST. It's the one number that tells you if this shop is winning, losing, or steady. Here's how Diner 21 broke down on Apr 30, 2026.
Diner 21 is tracked nightly in Operator's Diner market index for New Haven, CT.
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Reviews pulled nightly from Google, Yelp, and Meta. Aggregate weighted by recency and source authority.
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