NSTS Bancorp, Inc. operates as a savings and loan holding company for North Shore Trust and Savings that provides banking products and services in Illinois. The company offers checking, money market, savings, and time deposit accounts; and one- to four-family residential mortgage, multi-family and commercial real estate, construction, home equity, and consumer loans. It operates through a main banking office in Waukegan, Illinois; and two full-service branch offices located in Waukegan and Lindenhurst, Illinois, as well as a loan production office in Chicago, Illinois. The company was founded in 1921 and is headquartered in Waukegan, Illinois.