India:
18 years of age; universal
Indonesia:
17 years of age; universal and married persons regardless
of age
Iran:
15 years of age; universal
Iraq:
18 years of age; universal
Ireland:
18 years of age; universal
Israel:
18 years of age; universal
Italy:
18 years of age; universal (except in senatorial elections,
where minimum age is 25)
Jamaica:
18 years of age; universal
Japan:
20 years of age; universal
Jersey:
NA years of age; universal adult