American Bank | 2,488 followers on LinkedIn. For over 27 years, American Bank has been successfully serving the financial needs of small to mid-size businesses throughout the country with a concentration on the Baltimore and Washington DC markets. As a mid-sized community bank, we partner with businesses to help increase efficiencies and decrease costs. American Bank is the expert in fulfulling business banking needs in a convenient, more cost effective manner which reduces expenses and improves cash flow.