Mari Johanna Kiviniemi (born 27 September 1968) is a Finnish politician, who served as the 41st and second female Prime Minister of Finland from 2010 to 2011.

Kiviniemi is a career politician, and first ran as a candidate for Member of Parliament in 1991, garnering less than 5,000 votes, while serving as the Secretary-General of the Centre Party Student Union.

[4] The year after completing the work for her master's degree in Social Sciences, she ran again in the 1995 general elections, this time winning a seat from the Southern Ostrobothnia district with 9,350 votes.

Kiviniemi initially declared that her party would not seek to be part of the next government, but later accepted an invitation by Jyrki Katainen to join coalition negotiations.

[9] Those negotiations broke down, however, and after six other parties announced they had come to an agreement, she presented her government's resignation to the President and was officially succeeded by Katainen as Prime Minister on 22 June 2011.

[11] Her role consists of sharing her experience to help increase the impact and relevance of OECD work and to contribute to the public policy challenges of promoting inclusive growth, jobs, equality and trust.

She is responsible for the strategic oversight of the OECD's work on Efficient and Effective Governance; Territorial Development; Trade and Agriculture, as well as Statistics.

She lists her hobbies as listening to classical music (she plays the piano and flute), running, skiing, and in-line rollerblading.