Introduction
This article is about the municipality of Finland. For the lake, see Lake Lappajärvi. You can help expand this article with text translated from the corresponding article in Finnish.  (June 2023) Click [show] for important translation instructions. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must follow the LLM translation guideline, revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing Finnish Wikipedia article at [[:fi:Lappajärvi]]; see its history for attribution. You may also add the template {{Translated|fi|Lappajärvi}} to the talk page. For more guidance, see Wikipedia:Translation. Municipality in South Ostrobothnia, FinlandLappajärviMunicipalityLappajärven kuntaLappajärvi kommun Coat of armsLocation of Lappajärvi in FinlandInteractive map of LappajärviCoordinates: 63°13′N 023°38′E / 63.217°N 23.633°E / 63.217; 23.633Country FinlandRegionSouth OstrobothniaSub-regionJärviseutuCharter1865Government • Municipal managerSami AlasaraArea (2018-01-01) • Total522.98 km2 (201.92 sq mi) • Land420.89 km2 (162.51 sq mi) • Water102.89 km2 (39.73 sq mi) • Rank200th largest in FinlandPopulation (2025-12-31) • Total2,704 • Rank225th largest in Finland • Density6.42/km2 (16.6/sq mi)Population by native language • Finnish92.4% (official) • Swedish0.5% • Others7.1%Population by age • 0 to 1413.9% • 15 to 6450.3% • 65 or older35.8%Time zoneUTC+02:00 (EET) • Summer (DST)UTC+03:00 (EEST)Websitelappajarvi.fi Lappajärvi is a municipality in Finland's South Ostrobothnia region. It is located 78 kilometres (48 mi) from Seinäjoki, 80 kilometres (50 mi) from Kokkola and 117 kilometres (73 mi) from Vaasa. The municipality has a population of 2,704 (31 December 2025) and covers an area of 522.98 square kilometres (201.92 sq mi) of which 102.89 km2 (39.73 sq mi), or nearly 20% is water. The population density is 6.42 inhabitants per square kilometre (16.6/sq mi). The municipality is unilingually Finnish. Lake Lappajärvi, which gives the name to the municipality, is a meteor crater, one of the few meteor crater lakes found in Finland. Singer and performer, Timo Kotipelto from the worldwide known Finnish power metal band Stratovarius was born and raised in Lappajärvi.