Founded in 1860 as the Downington Bank. DNB First has grown from its humble roots to a bank of a national scale. Putting its customers and quality services first. Bank branches in Chester County & Delaware County. Free personal checking, mobile & online banking, business banking & wealth management services. DNB First offers a wide range of business banking solutions and expertise - right in your neighborhood. With branches throughout Chester County, Delaware County and now Philadelphia County, you can depend on us to be here to support you - each and every day.