[1] After attending grammar school in his hometown of Dornbirn, Blenk studied jurisprudence at the University of Innsbruck, where he received his doctorate in 1949.
Blenk was a member of the KMV Siegberg Dornbirn, Cartellverband, and the AV Austria Innsbruck.
By 1976, he was a member of the Parliamentary Assembly of the Council of Europe, where he was chairman of the 1981 European People's Party Group.
Blenk was appointed as a national councilman on 31 March 1970 for more than 20 years for six legislative periods.
His daughter, Andrea Kaufmann (née Blenk), is the current mayor of Dornbirn.