Absentee voter turnout in Kentucky is about 200 percent higher than this time in 2004 even though some parts of the state are seeing decreases.
State officials say the biggest increases are in metropolitan areas.
The numbers are also up in places where presidential candidates Hillary Clinton and Barack Obama have campaign offices.
Officials in Perry County say less than half the people who normally vote early have cast their ballots.
Some say no preference for either democratic candidate is to blame.
Secretary of State Trey Grayson is predicting a 20 to 25 percent turnout in Tuesday's presidential primary.
The state average is 15 percent.
Some voters will have more decisions to make when they head to the polls Tuesday.
A number of counties will have judicial races on their ballot in addition to other races such as the presidential, congressional, and legislative races.
Voters in Knox, Laurel, Whitley and McCreary Counties will see judicial races on their ballots.