Zip Code State Lookup

Auto-fills US state information from zip codes and city names. Supports 18,720+ cities with toggle control.

Zip Code State Lookup – Smart Auto-Fill for Professionals Streamline your workflow with fast, accurate state lookups based on US zip codes. Designed for professionals handling high-volume form entry across CRMs, ERP systems, healthcare portals and government platforms. What It Does This extension automatically fills in the US state when a valid zip code is entered in a form field. Built for speed, accuracy and privacy, so you can focus on your work, not manual lookups. Key Features Complete coverage of all US cities, territories and military addresses Smart handling of ambiguous city names like Springfield or Portland Intelligent field detection that works on inputs, dropdowns and dynamic content Privacy-first design with no tracking or data collection Fast performance with instant response times Who It’s For Great for professionals in: Customer service, admin and sales Healthcare and education Government and public sector E-commerce and logistics Get Started Click "Add to Chrome" Start typing zip codes in online forms The state fills in automatically with no setup required