Exhibit 99.1

NORTHWEST INDIANA BANCORP

ANNOUNCES QUARTERLY DIVIDEND INCREASE

Munster, Indiana — On May 18, 2018, the Board of Directors for the NorthWest Indiana Bancorp (the “Bancorp”), the holding company for Peoples Bank, declared a $0.01 (one cent) per share increase in its quarterly cash dividend paid to shareholders.

The Bancorp’s new quarterly dividend of $0.30 (thirty cents) per share represents a 3.5% increase over the previous dividend of $0.29 (twenty-nine cents) per share. The dividend will be paid to shareholders of record as of June 29, 2018 with payment made on July 11, 2018.

“Northwest Indiana Bancorp and our subsidiary, Peoples Bank, continue to meet expectations to create value for our customers, communities, and stakeholders. The consistency of our financial performance allows our directors to increase our dividend as we share the benefits of our performance with our shareholders. The execution of our community bank strategic plan also provides the capital for growth through acquisitions as well as the expansion of our existing customer base,” said David A. Bochnowski, executive chairman.

About NorthWest Indiana Bancorp

NorthWest Indiana Bancorp is a locally managed and independent financial holding company headquartered in Munster, Indiana, whose activities are primarily limited to holding the stock of Peoples Bank. Peoples Bank provides a wide range of personal, business, electronic and wealth management financial services from its 16 locations in Lake and Porter Counties in Northwest Indiana. NorthWest Indiana Bancorp’s common stock is traded on the OTC Bulletin Board under the symbol NWIN. The website ibankpeoples.com provides information on Peoples Bank’s products and services, and NorthWest Indiana Bancorp’s investor relations.

Forward Looking Statements

“Forward-looking statements” as defined in the Private Securities Litigation Reform Act of 1995 may be included in this release. A variety of factors could cause the Bancorp’s actual results to differ from those expected at the time of this release. These include, but are not limited to, changes in economic conditions in the Bancorp’s market area, changes in policies by regulatory agencies, fluctuation in interest rates, demand for loans in the Bancorp’s market area, economic conditions in the financial services industry, the Bancorp’s ability to successfully integrate the operations of recently acquired institutions, competition and other risks set forth in the Bancorp’s reports filed with the Securities and Exchange Commission, including its Annual Report on Form 10-K for the year ended December 31, 2017. Readers are urged to carefully review and consider the various disclosures made by the Bancorp in its periodic reports filed with the Securities and Exchange Commission. Forward-looking statements speak only as of the date they are made, and the Bancorp undertakes no obligation to update them in light of new information or future events.