|Pilot station and lighthouse in Marjaniemi|
|• Municipal manager||Ari Nurkkala|
|• Total||1,082.70 km2 (418.03 sq mi)|
|• Land||200.53 km2 (77.43 sq mi)|
|• Water||882.17 km2 (340.61 sq mi)|
|Area rank||104th largest in Finland|
|• Rank||323rd largest in Finland|
|• Density||4.93/km2 (12.8/sq mi)|
|Population by native language|
|• Finnish||99.1% (official)|
|Population by age|
|• 0 to 14||13.9%|
|• 15 to 64||61.5%|
|• 65 or older||24.6%|
|Time zone||EET (UTC+2)|
|• Summer (DST)||EEST (UTC+3)|
|Municipal tax rate||19.25%|
Hailuoto (Swedish: Karlö) is an island and a municipality in Northern Ostrobothnia region, Finland. The population of Hailuoto is 989 (August 31, 2013) and the municipality covers an area of 200.53 km2 (77.43 sq mi) (excluding sea areas) of which 1.70 km2 (0.66 sq mi) is inland water (January 1, 2011). The population density is 4.93 /km2 (12.8 /sq mi).
Hailuoto is located on an island of the same name opposite the city of Oulu in the Gulf of Bothnia. A ferry operates regularly between Hailuoto and Oulunsalo. In winter an official ice road connects the island to the mainland.
Land in the region is constantly rising due to post-glacial rebound. It is estimated that the first parts of Hailuoto appeared from the Baltic Sea about 1700 years ago. The current island of Hailuoto was formed from many smaller islands. Two large sections, Santonen and Hanhinen merged into the main island (Luoto) only about two centuries ago. The island is continuously expanding and eventually it will join with the continent. Kirkkosalmi, a wetland region between Hanhinen and Luoto is renowned for being an important bird refuge where rare bird species are observed.
- "Area by municipality as of 1 January 2011" (PDF) (in Finnish and Swedish). Land Survey of Finland. Retrieved 9 March 2011.
- "VÄESTÖTIETOJÄRJESTELMÄ REKISTERITILANNE 31.8.2013" (in Finnish and Swedish). Population Register Center of Finland. Retrieved 15 September 2013.
- "Population according to language and the number of foreigners and land area km2 by area as of 31 December 2008". Statistics Finland's PX-Web databases. Statistics Finland. Retrieved 29 March 2009.
- "Population according to age and gender by area as of 31 December 2008". Statistics Finland's PX-Web databases. Statistics Finland. Retrieved 28 April 2009.
- "List of municipal and parish tax rates in 2011". Tax Administration of Finland. 29 November 2010. Retrieved 13 March 2011.
- Media related to Hailuoto at Wikimedia Commons
- Municipality of Hailuoto – Official site (Finnish)
- Hailuoto travel guide from Wikivoyage
- Ferry timetables (Finnish)
- Bothnian Bay Research Station of the University of Oulu
- Live webcam from the ferry