Kosciusko is a mostly non-residential neighborhood located in St. Louis, Missouri. It begins at the Mississippi River front in the east and goes up to 7th Boulevard and 8th Street in the west. Interstate 55 is a northern border, and St. George and Dorcas Streets border the south of this neighborhood. Kosciusko is named in honor of Tadeusz Kościuszko, …Kosciusko is a mostly non-residential neighborhood located in St. Louis, Missouri. It begins at the Mississippi River front in the east and goes up to 7th Boulevard and 8th Street in the west. Interstate 55 is a northern border, and St. George and Dorcas Streets border the south of this neighborhood. Kosciusko is named in honor of Tadeusz Kościuszko, an American Revolutionary War general of Polish descent.