Frederik "Frits" Korthals Altes (born 15 May 1931) is a retired Dutch politician of the People's Party for Freedom and Democracy (VVD) and jurist.

After the 1982 general election, Korthals Altes was appointed as Minister of Justice in the Lubbers I cabinet, taking office on 4 November 1982.

After the 1986 general election, Korthals Altes continued as Minister of Justice in the Lubbers II cabinet, taking office on 14 July 1986.

Korthals Altes was nominated as President of the Senate following the appointed of Herman Tjeenk Willink as Vice-President of the Council of State, taking office on 11 March 1997.

The final report of the commission advised the government to abandon electronic voting machines, as they lack a paper trail.