Maarit Kristiina Feldt-Ranta (26 April 1968 – 27 November 2019) was a Finnish politician. She represented the Social Democratic Party of Finland. She had represented the electoral district of Uusimaa in the Parliament of Finland from March 2007 through April 2019. In 2017, she was elected as the vice-chair of the party. Feldt-Ranta was born in Karis, Finland.