St. Josaphat (Polish: Kościół Świętego Jozafata and in Kashubian as Kòscół Swiãtégò Jozafata) is a historic church of the Roman Catholic Archdiocese of Chicago located at 2311 North Southport Avenue in Chicago, Illinois.

St. Josaphat's two massive Romanesque belltowers are a hallmark view of the Lincoln Park skyline.

The congregation dates back to 1882, when a 13-member committee of Chicago's Kashubian Polish community formally approached the Resurrectionist Father Vincent Barzynski, then Chicago's preeminent Polish priest, for his assistance in establishing a Kashubian parish.

[1] In the twenty-first century, Saint Josaphat's now serves an overwhelmingly young, white, urban professional congregation in a newly prosperous, gentrified neighborhood.

The Romanesque church, built at a cost of $125,000 in 1902, was designed by William J. Brinkmann, who also drew plans for the Neogothic masterpiece of St. Michael the Archangel in South Chicago.