Not all of them are running for re-election; however, here are the 10 Senate Districts and incumbents: (From State Elections Web Page and Legislative Web Page):

State Senate Districts: B ( Coghill) - D ( Huggins)- F( Stoltze)  - H (Wielechowski)  - J ( Ellis)  - L ( McGuire)  - N(  Giessel)  - P ( Stevens)  - R (Stedman) and - T (Olson)