Suffolk Bank was a clearinghouse bank in Boston, Massachusetts, that exchanged specie or locally backed bank notes for notes from country banks to which city-dwellers could not easily travel to redeem notes. It operated from 1818 until 1858.
The bank operated by redeeming country banks' notes at par value, so long as the banks maintained an account with Suffolk Bank. To qualify for such an account, a bank was required to remit a starting deposit of $2000 or more, and—in the case of banks not located in Boston—to maintain a sufficient balance to redeem any of the banks' notes that Suffolk Bank might receive for redemption. Beginning in 1824, "all of the banks in Boston, with the exception of the New England [a competing clearinghouse bank], agreed to make the Suffolk Bank their agent for the redemption of bills of outside banks." The Suffolk Bank enabled member banks to deposit notes from other banks at par value, and to be credited for these deposits within one business day. The bank operated in this manner until the Bank of Mutual Redemption was organized in 1858 and assumed this role for all of New England.
In his History of Money and Banking in the United States, Murray Rothbard credits the Suffolk Bank with exercising "a stabilizing influence on the New England economy." John Jay Knox, a former Comptroller of the United States Treasury, stated that the success of the Suffolk Bank demonstrated that,
- the fact is established that private enterprise could be entrusted with the work of redeeming the circulating notes of the banks, and it could thus be done as safely and much more economically than the same service can be performed by the Government.
- History of central banking in the United States#1837–1862: "Free Banking" Era
- Federal Reserve System
- New York Clearing House
- The Suffolk System
- Rolnick, Arthur J., Bruce D. Smith, and Warren E. Weber. "The Suffolk Bank and the Panic of 1837." Federal Reserve Bank of Minneapolis Quarterly Review. Vol. 24, No. 2, Spring 2000, pp. 3–13 
- Davis, William Thomas. Professional and Industrial History of Suffolk County, Massachusetts. Boston History Co. 1894. p. 204. 
- Rothbard, Murray N. History of Money and Banking in the United States. Ludwig von Mises Institute. 2002. p. 117. 
- Trivoli, George. "The Suffolk Bank: A Study of a Free–enterprise Clearing System." Adam Smith Institute. 1979. p. 11. 
- Rothbard, Murray N. History of Money and Banking in the United States. Ludwig von Mises Institute. 2002. p. 119. 
- Knox, John Jay. Quoted in Rothbard, Murray N. History of Money and Banking in the United States. Ludwig von Mises Institute. 2002. p. 120.