Maria Cornelia Gezina "Mona" Keijzer (born 9 October 1968) is a Dutch politician and former civil servant serving as State Secretary for Economic Affairs and Climate Policy since 2017.
A member of the Christian Democratic Appeal (CDA), she previously served in the House of Representatives (2012–2017).
She focused on matters of nursing, home care and culture.
Before being a full-time politician she worked as an environmental jurist for the municipalities of Waterland and Almere, as well as for the province of Gelderland.