Hong Kong
direct election 18 years of age; universal for permanent
residents living in the territory of Hong Kong for the past seven
years; indirect election limited to about 200,000 members of
functional constituencies and an 800-member election committee drawn
from broad regional groupings, municipal organizations, and central
government bodies

Hungary
18 years of age; universal

Iceland
18 years of age; universal

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

Isle of Man
16 years of age; universal

Israel
18 years of age; universal