Klaas Henricus Dominicus Maria Dijkhoff (born 13 January 1981) is a Dutch legal scholar and politician who led the People's Party for Freedom and Democracy in the House of Representatives from 2017 to 2021.

After the resignation of Minister of Defence Jeanine Hennis-Plasschaert, Dijkhoff was nominated to serve out the remainder of her term in the already demissionary Second Rutte cabinet and resigned as State Secretary for Security and Justice on 4 October 2017 and served as Minister of Defence until the Third Rutte cabinet was installed on 26 October 2017.

Klaas Henricus Dominicus Maria Dijkhoff was born on 13 January 1981 in the town of Soltau in Germany.

He is the son of officer Henricus Marikus Cornelis Dijkhoff and nurse Petronella Dominicus Maria Thijssen.

He booked his biggest success in stopping subsidies to development organisations with a chairman earning more than €124,000.00 a year.

His motions called upon the cabinet to stop free travel to conflict zones and denationalisation of Jihad fighters.