State Farm is a large group of insurance companies throughout the United States with corporate headquarters in Bloomington, Illinois. State Farm is the largest property and casualty insurance provider in the United States. It is also the largest auto insurance provider in the United States. State Farm is ranked 36th in the 2019 Fortune 500, which lists American companies by revenue. State Farm relies on exclusive agents (also known as captive agents) to sell insurance. Only State Farm agents can sell State Farm insurance, and their agents can sell only State Farm products.