The proportion of voters over 50 in upcoming local elections in June will be 0.7 percent greater than during the presidential election in 2012, while that of younger voters will shrink.
The Ministry of Security and Public Administration on Monday said the estimated number of eligible voters on June 4 is 41.1 million, up 1.5 percent from the presidential election.
The proportion of voters in their 50s will increase by 0.3 percent to 19.5 percent of the total, and that of voters in their 60s from 20.8 percent to 21.2 percent.
On the other hand the presence of young voters will diminish, with the proportion of those under 30 dwindling by 0.1 percent and those in their 30s by 0.6 percent.
The change may have an impact on the result. Prof. Kim Hyung-joon at Kookmin University said, "There are no issues or triggers that would draw young voters into the polling booths, so the aging population will have a big influence on the outcome."