Ottawa. 1 City (1990 pop. 17,451), seat of La Salle co., N central Ill., at the confluence of the Fox and Illinois rivers, in a fertile farm area; inc. as a city 1853. The city has diversified agriculture and manufactures glass, tools, building materials, and automobile parts. Points of interest include the site of the first Lincoln-Douglas debate (1858) and Fort Johnson (1832). Several state parks are in the area, and scenic attractions along the rivers draw many visitors. 2 City (1990 pop. 10,667), seat of Franklin co., E Kans., on the Marais des Cygnes River; inc. 1867. The rail and industrial center of a farm area, it has a variety of light industries. The city is named for the Ottawa, who moved there (1832) after ceding their Ohio lands to the United States; they were subsequently removed (1867) to Oklahoma. Ottawa Univ. is in the city.