Marathon Bancorp, Inc. operates as a bank holding company for Marathon Bank that provides banking products and services in the United States. It offers deposit account products, including non-interest-bearing checking, interest-bearing checking, money market, savings, individual retirement, and certificate of deposit accounts. The company also provides lending products, such as one-to-four family residential real estate, commercial real estate, construction, commercial and industrial, multifamily real estate, and consumer loans, as well as home and personal loans. In addition, it offers vehicle and equipment financing, small business administration, commercial checking, credit and debit cards, and treasury management, as well as online and mobile banking services. Further, the company provides ATM facilities. Marathon Bancorp, Inc. was founded in 2020 and is based in Wausau, Wisconsin.