Mari Inka-Elina Leppänen (née Pentikäinen, born 26 September 1978 in Helsinki, Finland) is a Finnish theologian and the Bishop to the Archdiocese of Turku, together with the Archbishop Tapio Luoma, in the Evangelical Lutheran Church of Finland.
Leppänen was the first ordained woman of the Conservative Laestadianism branch of the Lutheran Church of Finland.
Leppänen served as a parish priest in Lieto 2012–2014, worked as a project manager at the Office of the Church Council in 2014, and served as an advisor to the previous assistant bishop in Turku, Kaarlo Kalliala 2015–2017.
According to the decision of the ELCF General Synod, the area of the primary oversight of the Bishop of Turku Archdiocese consists of 42 parishes, whereas the Archbishop's primary diocesan oversight covers the deanery of Turku which consists of 9 parishes.
Moreover, the Bishop of Turku Archdiocese is in charge of the day-to-day running of the Diocesan Chapter.