Niue:
18 years of age; universal
Norfolk Island:
18 years of age; universal
Northern Mariana Islands: 18 years of age; universal; indigenous inhabitants are US citizens but do not vote in US presidential elections
Norway:
18 years of age; universal
Oman:
in Oman's most recent elections in 2000, limited to
approximately 175,000 Omanis chosen by the government to vote in
elections for the Majlis ash-Shura
Pakistan:
21 years of age; universal; separate electorates and
reserved parliamentary seats for non-Muslims
Palau:
18 years of age; universal
Panama:
18 years of age; universal and compulsory
Papua New Guinea:
18 years of age; universal
Paraguay:
18 years of age; universal and compulsory up to age 75