Ulla Pirkko Nenonen (31 October 1933, in Loviisa, Finland – 9 March 2018, in Tampere, Finland)was a Finnish theologian, missionary with the Finnish Missionary Society and Bible translator, who served in missionary work in Namibia during a 54-year span. Of Finnish missionaries, only Martti Rautanen and his wife Frieda and daughter Johanna have served longer in the mission field.