Marathon Bancorp, Inc. operates as a bank holding company for Marathon Bank that provides banking products and services in the United States. The company offers deposit account products, including checking, savings, money market, and certificate of deposit accounts. It also provides lending products, such as commercial and multifamily real estate loans, one- to four-family residential real estate loans, commercial and industrial loans, and construction and consumer loans. In addition, the company offers treasury management; small business banking and administration loan; municipal banking; specialty banking services; credit cards; ATM; and mobile and online banking services. The company was founded in 1902 and is based in Wausau, Wisconsin. Marathon Bancorp, Inc. operates as a subsidiary of Marathon MHC.