2023 in Finland

• President: Sauli Niinistö
• Prime Minister: Sanna Marin, Petteri Orpo
• Parliament: 2019–2023 Eduskunta/Riksdag
• Speaker of the Parliament: Matti Vanhanen

Ongoing — Accession of Finland to NATO (Until 4 April)

• 1 March – The Finnish Parliament votes 184–7 to formally approve the country's accession to NATO, and to adopt the military alliance's founding documents.[1]
• 2 April – 2023 Finnish parliamentary election: Finns head to the polls to elect the 200 members of the parliament. Centre-right National Coalition Party wins the most votes at 20.7%, while the ruling Social Democratic Party places third with 19.9%.[2] The Finns Party becomes the 2nd largest party in Parliament and got its highest vote ever with 20.1%.
• 4 April – Finland officially joins NATO, becoming the 31st member of the military alliance and expanding NATO's border with Russia by 1,300 kilometres (810 mi).[3]
• 10 May – 2023 Espoo bridge collapse.[4]
• 20 June – 2023 Finnish parliamentary election: Petteri Orpo is officially appointed as the 47th Prime Minister and his cabinet is formed.[5]
  • Former Finns Party leader Jussi Halla-aho is named Speaker of the Parliament of Finland[6][7]
• 30 June – Finns Party Vilhelm Junnila announced that he would resign as Minister of Economic Affairs in the Orpo Cabinet. After Junnila's past actions and potential connections to neo-Nazi organizations became a subject of heated discussion.[8][9]
• 10 October – Finland reports that the Balticconnector submarine pipeline connecting Finland and Estonia has been closed following damage and a gas leak.[10]

• UEFA Euro 2024 qualifying Group H
• 2022–23 Liiga season

• 13 January – Kai Kalima, 77, lawyer and politician, MP (1989–1991).[11]
• 14 January – Juhan af Grann, 78, film director and unidentified flying object documentary filmmaker.[12]
• 16 January – Reino Nyyssönen, 87, tennis player.[13]
• 27 January – Raimo Aulis Anttila, 87, linguist.[14]
• 8 February – Arto Heiskanen, 59, ice hockey player (Porin Ässät, Lukko, Albatros de Brest).[15]
• 13 February – Mikaela Fabricius-Bjerre, 53, Olympic dressage rider (2012).[16]
• 27 February – Juha Valjakkala, 57, convicted murderer.[17]
• 5 March –
  • Ilkka Järvi-Laturi, 61, Finnish-born American film director (Spy Games).[18]
  • Matti Klinge, 86, historian.[19]
• 8 March – Pentti Koskinen, 79, Olympic diver (1964, 1968, 1972).[20]
• 18 March – Pekka Paavola, 89, politician, minister of justice (1972).[21]
• 21 March – Harri Nykänen, 69, writer.[22]
• 27 March – Tauno Honkanen, 95, Olympic skier (1948).[23]
• 22 April – Ulf Sundqvist, 78, politician, minister of education (1972–1975) and trade (1979–1981).[24]
• 26 April – Stina Rautelin, 59, Finnish-Swedish actress (Beck, Fallet, Rederiet).[25]
• 29 April – Eero Saari, 94, Olympic ice hockey player (1952).[26]
• 5 May –
  • Martti Aiha, 70, sculptor.[27]
  • Siiri Rantanen, 98, cross-country skier, Olympic champion (1956).[28]
• 6 May – Raimo Partanen, 82, Olympic skier (1964).[29]
• 13 May – Johan Gullichsen, 86, Olympic sailor (1964).[30]
• 26 May – Nils Henriksson, 94, Olympic cyclist (1952).[31]
• 28 May – Matti Kilpiö, 83–84, philologist.[32]
• 29 May –
  • Teppo Rastio, 89, ice hockey (Lukko, Ilves) and football (national team) player.[33]
  • Tove Skutnabb-Kangas, 82, linguist.
• 2 June – Kaija Saariaho, 70, composer (Petals, La Passion de Simone, D'Om le Vrai Sens).[34]
• 7 June – Eva Hög, 95, Olympic cross-country skier (1960).[35]
• 8 June – Mari Ruti, 58–59, Finnish-born Canadian philosopher.[36]
• 10 June – Jari Niinimäki, 65, footballer (Ilves, AIK, national team).[37]
• 18 June – Anders Ruben Forsblom, 91, Olympic cyclist (1952).[38]
• 23 June – Kunto Ojansivu, 63, actor (Elf Toljander, Sibelius, Rentun Ruusu).[39]
• 26 June – Juha Hernesniemi, 75, neurosurgeon.[40]
• 4 July – Miki Liukkonen, 33, writer, poet and musician.[41]
• 10 July – Eero Lohi, 95, Olympic modern pentathlete (1960).[42]
• 15 July – Yrjö Hakala, 91, Olympic ice hockey player (1952, 1960).[43]
• 28 July – Timo Hirvonen, 49, ice hockey player (Kiekko-Espoo, SaiPa) and coach.[44]
• 7 August – Aimo Vartiainen, 96, Olympic alpine skier (1948).[45]
• 20 August – Pentti Virrankoski, 94, Canadian-born Finnish historian.[46]
• 26 August – Lasse J. Laine, 77, ornithologist.[47]
• 27 August – Minna Tarkka, 62, art critic and curator.[48]
• 4 September – Eero Laine, 89, Olympic rower (1960).[49]
• 5 September – Erkki Hautamäki, 93, Olympic decathlete (1952) and historian.[50]
• 16 September – Torsti Lehtinen, 81, writer and philosopher.[51]
• 25 September – Juhani Salovaara, 91, Olympic sailor (1964).[52]
• 13 October – Jaakko Ihamuotila, 83, business executive, CEO of Valmet (1973–1979), president and chairman of Neste (1980–2000).[53]
• 16 October – Martti Ahtisaari, 86, politician, president (1994–2000), Nobel Prize laureate (2008).[54]
• 20 October – Risto Näätänen, 84, psychologist.[55]
• 23 October – Aira Samulin, 96, dance teacher and entrepreneur.[56]