 Wartau has received a significant immigrant population since the later 20th century, reflected by 7.8% (367 individuals) identifying as Muslim in the 2000 census.5.5% (261 individuals) identified as non-religious (atheist or agnostic).The Gretschins-Herrenfeld and Ochsenberg prehistoric settlement and sacrifice site as well as the ruins of Wartau Castle and the so-called "Walser" Rathaus (town council house) "auf Palfries" are listed as Swiss heritage sites of national significance.