The Centre Party (Finnish: Suomen Keskusta [ˈsuo̯men ˈkeskustɑ], Kesk; Swedish: Centern i Finland, C), officially the Centre Party of Finland, is an agrarian political party in Finland. Ideologically, the Centre Party is positioned in the centre of the political spectrum. It has been described as being liberal and liberal-conservative. The party’s leader is Antti Kaikkonen, who was elected in June 2024 to succeed former minister Annika Saarikko. As of June 2023, the party has been a part of the parliamentary opposition.

Founded in 1906 as the Agrarian League (Finnish: Maalaisliitto; Swedish: Agrarförbundet), the party represented rural communities and supported the decentralisation of political power from Helsinki. In the 1920s, the party emerged as the main rival to the SDP. Kyösti Kallio, the party's first prime minister, held the office for four times between 1922 and 1937. After World War II, the party settled as one of the four major political parties in Finland, alongside the SDP, the National Coalition Party and the Finnish People's Democratic League until the 1980s. Urho Kekkonen served as President of Finland from 1956 to 1982, by far the longest period of any president. The name Centre Party was adopted in 1965 and Centre of Finland in 1988. The Centre Party was the largest party in Parliament from 2003 to 2011, during which time Matti Vanhanen was prime minister for seven years. By 2011, the party was reduced in parliamentary representation from the largest party to the fourth largest, but it reclaimed its status as the largest party in 2015. In 2019, it suffered a considerable defeat, losing 18 of 49 seats.

As a Nordic agrarian party, the Centre Party's political influence is greatest in small and rural municipalities, where it often holds a majority of the seats in the municipal councils. Decentralisation is the policy that is most characteristic of the Centre Party which has been the ruling party in Finland a number of times since Finnish independence. Twelve of the Prime Ministers of Finland, three of the Presidents and a former European Commissioner for Economic and Financial Affairs have been from the party. The Centre Party is the mother organisation of the Finnish Centre Students, the Finnish Centre Youth and the Finnish Centre Women [fi].

The party was founded in 1906 as a movement of citizens in the Finnish countryside. Before Finnish independence, political power in Finland was centralised in the capital and to the estates of the realm. The centralisation gave space for a new political movement. In 1906, two agrarian movements were founded. They merged in 1908 to become one political party known as the Agrarian League or Maalaisliitto. An older, related movement was the temperance movement which had overlapping membership and gave future to Agrarian League activists experience in working in an organisation.

Soon the ideas of humanity, education, the spirit of the land, yeomanly liberty, decentralisation, "the issue of poor people", progressivism and later the "green wave" became the main political phrases used to describe the ideology of the party. Santeri Alkio was the most important ideological father of the party.

At the dawn of Finnish independence, conservative social forces made an attempt to establish the Kingdom of Finland. The Agrarian League opposed monarchism fiercely, even though monarchists claimed that a new king from the German Empire and Hohenzollern would have safeguarded Finnish foreign relations. At this time, anti-anarchist peasants threatened the existence of the party.^{[clarification needed]}

Because around forty Social Democratic members of the Parliament had escaped to Russia after the Finnish Civil War and about fifty others had been arrested, the Agrarian League members of the Parliament became the only republicans in Parliament in 1918. Nevertheless, the news about the problems of the German Empire from German liberals encouraged the fight of Agrarian League in the Parliament.

The Agrarian League managed to maintain the republican voices in the Parliament until the fall of the German Empire which ruined the dreams of the monarchists. The relentless opposition to the monarchy was rewarded in the 1919 Finnish parliamentary election and the party became the biggest non-socialist party in Finland with 19.7% of the votes.