Sietse Rindert Fritsma (born 31 March 1972 in Franeker) is a Dutch politician and former civil servant.
As a member of the Party for Freedom (Partij voor de Vrijheid) he has been an MP since 30 November 2006.
He focuses on matters of social affairs, employment, political asylum and immigration.
From March 2010 till January 2011 he was also a member and PVV fraction leader of the municipal council of The Hague.
He previously worked for the Dutch Immigration and Naturalisation Service (IND).
Fritsma studied human geography at the University of Groningen.
He obtained a master's degree in spatial science, specializing in regional geography of developing countries.
Around 1990 he lived for a year in an Israeli kibbutz.