Quarterly real GDP by US state from the Bureau of Economic Analysis (BEA) Regional accounts — all-industry total, in millions of chained (inflation-adjusted) dollars. Requires state (2-letter); optionally a specific year (defaults to the last 5 years). Returns the state name plus GDP observations (period like 2025Q2, real GDP in millions USD, unit), newest quarter first. Free, public-domain (BEA). Authoritative state economic-output data an LLM cannot recall — for economic research, regional analysis, and market sizing.