Juhana Mikael Vartiainen[1] (born 28 May 1958[1]) is a Finnish politician, economist[2] and a member of the Finnish Parliament, representing the National Coalition Party, which he joined after having been a member of the Social Democratic Party of Finland from 1975 to 2015.

Vartiainen completed his mandatory military service in Finland and his current rank in the reserve is lieutenant.

Vartiainen worked at the Konjunkturinstitutet until 2012, when he became the Director General of the Finnish VATT Institute for Economic Research, an institution that produces and studies scientific research and analyses of micro- and macroeconomics as well as economic policy in Finland.

[12] As expected, Vartiainen assumed the title of Mayor of Helsinki in August 2021, when the newly elected session of the city council began and the council chose a mayor, traditionally picked from the party with the largest share of representatives.

[2] Vartiainen does not support the Marin administration's social and healthcare reform law (in Finnish sote-uudistus), which he describes as counter-productive, cost-increasing and expensive.