Kazimierz Olesiak (born February 22, 1937 in Huta Drewniana) is a Polish politician, engineer and activist.
He was the deputy prime minister and Minister of Agriculture, Forestry and Food Economy in Mieczyslaw Rakowski's government (1988-1989), for half a year (1989-1990) he was president of the Supreme Executive Committee of the Polish People's Party "Odrodzenie".