Making Sense of the Federal Reserve
The Fed's Regional Structure
This map highlights the 12 Reserve Bank Districts and identifies each District with its designated number and letter plus its headquarters and branches.
Notice that the size of the districts in the Northeast tend to be very small, while those in the West are very large. This size discrepancy relates to the population distribution in 1913, when the population was heavily concentrated along the East Coast.
The Federal Reserve System has adapted to changing population patterns by adding branch offices in the Districts. For example, the Twelfth District is very large geographically and includes Hawaii and Alaska. This District has four branches in addition to its headquarters in San Francisco.