A map of the World showing voting age minimum for all the countries. Most countries have a voting age of 18 years old. A few countries have a voting age of 16 and several have minimum voting ages above 18, up to 25 years old for a couple countries. Image by jklamo According to the world map, most countries set their voting age at __________. A. 16 B. 20 C. 21 D. 18