In 2012 he joined the Finns Party[3] and ran for the City Council of Oulu, receiving 232 votes[4] but was not elected.

However, Tynkkynen was elected third vice chairman of the Finns Party on 8 August 2015, defeating incumbent Juho Eerola.

[10] In late 2018 Tynkkynen tried to regain the Finns Party Youth chairman seat[11] but he got fewer votes than the other candidate Asseri Kinnunen.

[13] In October 2019 Tynkkynen was convicted of ethnic agitation for the second time and issued a 50 day-fine (approximately 4000 euros based on his income) for comments on Muslims.

He argued against the approval of the EU's stimulus package in the speech that was seen as a filibuster to delay the parliament's vote on the matter.

[15] In October 2021, Tynkkynen was convicted for a third time for inciting ethnic agitation, being issued a 70 day-fine (approximately 4400 euros).