Turnout is projected at 20 percent for Tuesday's elections across Wisconsin, which includes statewide races for Supreme Court justice and state education chief.
Wisconsin's voters will choose among more than 9,500 candidates for more than 6,700 state and local offices, as well vote in 76 different local referenda.
The turnout predication came Thursday from the Wisconsin Government Accountability Board.
GAB director Kevin Kennedy said turnout for spring elections with contested Supreme Court races typically has ranged from 18 percent to 21 percent of eligible voters over the last decade, so they expect this year's turnout to be in that range, too.
An exception was in April 2011 at the height of the Capitol protests when turnout jumped to 34 percent.
Turnout in last year's presidential election was 70 percent.