Birthactive
Citizenship at birth through a Finnish parent
Birth to a Finnish parent creates Finnish citizenship. Birth in Finland alone to two foreign parents is not general jus soli.
Citizenship routes
Ancestryreviewed
Naturalizationreviewed
Birthreviewed
Investmentreviewed
Naturalizationactive
Naturalization as the spouse of a citizen
A spouse of a Finn may naturalize after five years of residence, instead of eight.
Ancestryactive
Finnish citizenship through a Finnish parent
A child of a Finnish citizen parent is Finnish under the Citizenship Act. Declaration routes also exist for former citizens and certain Nordic cases.
Naturalizationactive
Citizenship after eight years residence
Adults generally need eight years legal residence in Finland. Five years can suffice with the required language skills, a Finnish spouse, or statelessness. Dual nationality is generally allowed. Grant is discretionary.
Sources: Finnish Immigration Service - Finnish citizenship · Finnish Immigration Service - period of residence