The bond market (also debt market or credit market) is a financial market where participants can issue new debt, known as the primary market, or buy and sell debt securities, known as the secondary market. This is usually in the form of bonds, but it may include notes, bills, and so on.

Its primary goal is to provide long-term funding for public and private expenditures. The bond market has largely been dominated by the United States, which accounts for about 44% of the market. As of 2009, the size of the worldwide bond market (total debt outstanding) is an estimated at $82.2 trillion, of which the size of the outstanding U.S. bond market debt was $31.2 trillion according to Bank for International Settlements (BIS), or alternatively $35.2 trillion as of Q2 2011 according to Securities Industry and Financial Markets Association (SIFMA).

Nearly all of the average daily trading in the U.S. bond market takes place between broker-dealers and large institutions in a decentralized over-the-counter (OTC) market. However, a small number of bonds, primarily corporate ones, are listed on exchanges.