The Panic of 1907, also known as the 1907 Bankers' Panic, was a financial crisis that occurred in the United States when the New York Stock Exchange fell close to 50 percent from its peak the previous year. Panic occurred during a time of economic recession, when there were numerous runs on banks and trust companies. The 1907 panic eventually spread throughout the nation when many state and local banks and businesses entered into bankruptcy. Primary causes of the run include a retraction of market liquidity by a number of New York City banks, loss of confidence among depositors, and the absence of a statutory lender of last resort.

The crisis occurred after the failure of an attempt in October 1907 to corner the market on stock of the United Copper Company. When this bid failed, banks that had lent money to the cornering scheme suffered runs that later spread to affiliated banks and trusts, leading a week later to the downfall of the Knickerbocker Trust Company—New York City's third-largest trust. The collapse of the Knickerbocker spread fear throughout the city's trusts as regional banks withdrew reserves from New York City banks. Panic extended across the nation as vast numbers of people withdrew deposits from their regional banks.