Description Clarkston Financial, the holding company for Clarkston State Bank, threw its hat into the ring of retail banking in 1998. The community bank serves area consumers and small to midsized businesses from about five locations in Oakland County, Michigan, north of Detroit. The bank offers standard deposit services, including checking, savings, and money market accounts, certificates of deposit, and IRAs. Clarkston Savings Bank uses these funds primarily to originate real estate loans; commercial mortgages account for the largest portion of its portfolio, followed by residential mortgages and construction and land development loans.