There is no statewide size limit. Daily harvest limit is 6 Bass, either singly or in the aggregate, except as specified under Site-Specific Regulations.
In streams and rivers (excluding the main-stem of the Mississippi, Ohio, including the Golconda Marina and Wabash Rivers) the daily harvest can contain no more than 3 Smallmouth Bass. In rivers and streams and their tributaries statewide, except for the Mississippi, Ohio (including the Golconda Marina), Wabash and Illinois Rivers, Calumet River, Lake Calumet Connecting Channel, Calumet Sag Channel and navigable portions of the Grand Calumet River and Little Calumet River, all Smallmouth Bass must be immediately released between April 1 and June 15.
Only statewide regulations are shown herein, but you can access Site-Specific Regulations online.