Do Finland passport holders need a visa to visit IS?

No. Finnish citizens do not need a visa to visit Iceland. Both Finland and Iceland are part of the EEA and the Schengen Area, so Finns enjoy full freedom of movement and can enter, travel, and stay for tourism with just a valid passport or national ID card. Finland is an EU/EEA member state and Iceland is an EEA and Schengen Area country (non-EU but fully in Schengen). Under EU/EEA freedom of movement, Finnish citizens may enter Iceland visa-free for tourism, business, or short visits using either a valid passport or a valid Finnish national identity card. There is no fixed 90-day cap for EU/EEA nationals as there is for third-country visa-waiver travelers: a Finn may stay up to three months without any formalities and can remain longer, but must register a legal domicile with Registers Iceland (Þjóðskrá) if staying beyond three months. The Schengen 90/180-day short-stay rule and the upcoming ETIAS travel authorization apply only to visa-exempt non-EU/EEA nationals (such as US, UK, or Canadian citizens); they do NOT apply to Finnish or other EU/EEA citizens. ETIAS, expected to launch in late 2026, will therefore never be required of Finns traveling to Iceland. The only practical requirement is carrying a valid travel document (passport or national ID card) that is valid on the day of travel; Iceland may conduct identity checks if internal Schengen border controls are temporarily reintroduced.