The Panic of 1873 was a financial crisis that triggered an economic depression in Europe and North America that lasted from 1873 to 1877 or 1879 in France and in Britain. In Britain, the Panic started two decades of stagnation known as the "Long Depression" that weakened the country's economic leadership. In the United States, the Panic was known as the "Great Depression" until the events of 1929 and the early 1930s set a new standard.

A financial crisis is any of a broad variety of situations in which some financial assets suddenly lose a large part of their nominal value. In the 19th and early 20th centuries, many financial crises were associated with banking panics, and many recessions coincided with these panics. Other situations that are often called financial crises include stock market crashes and the bursting of other financial bubbles, currency crises, and sovereign defaults. Financial crises directly result in a loss of paper wealth but do not necessarily result in significant changes in the real economy.