Koller was from 1980 Member of the council of Grafendorf near Hartberg and was in 1982 elected as district party leader of the FPÖ Hartberg.
Dienersdorf is a municipality in the district of Hartberg in Styria, Austria.
Ebersdorf is a municipality in the district of Hartberg in Styria, Austria.
Greinbach is a municipality in the district of Hartberg in Styria, Austria.
Großhart is a municipality in the district of Hartberg in Styria, Austria.
Hartberg Umgebung is a municipality in the district of Hartberg in Styria, Austria.
Hofkirchen bei Hartberg is a municipality in the district of Hartberg in Styria, Austria.
Kaibing is a municipality in the district of Hartberg in Styria, Austria.
Lafnitz is a municipality in the district of Hartberg in Styria, Austria.
Limbach bei Neudau is a municipality in the district of Hartberg in Styria, Austria.
Mönichwald is a municipality in the district of Hartberg in Styria, Austria.
Pöllauberg is a municipality in the district of Hartberg in Styria, Austria.
Puchegg is a municipality in the district of Hartberg in Styria, Austria.
Rabenwald is a municipality in the district of Hartberg in Styria, Austria.
Riegersberg is a municipality in the district of Hartberg in Styria, Austria.
Rohr bei Hartberg is a municipality in the district of Hartberg in Styria, Austria.
Saifen-Boden is a municipality in the district of Hartberg in Styria, Austria.
Sankt Jakob im Walde is a municipality in the district of Hartberg in Styria, Austria.
Sankt Johann in der Haide is a municipality in the district of Hartberg in Styria, Austria.
Schäffern is a municipality in the district of Hartberg in Styria, Austria.
Schlag bei Thalberg, a municipality in the district of Hartberg in Styria, Austria
Schlag bei Thalberg is a municipality in the district of Hartberg in Styria, Austria.
Schönegg bei Pöllau, a municipality in the district of Hartberg in Styria, Austria
Schönegg bei Pöllau is a municipality in the district of Hartberg in Styria, Austria.
Sebersdorf is a municipality in the district of Hartberg in Styria, Austria.
Siegersdorf bei Herberstein is a municipality in the district of Hartberg in Styria, Austria.
Sonnhofen is a municipality in the district of Hartberg in Styria, Austria.
Tiefenbach bei Kaindorf is a municipality in the district of Hartberg in Styria, Austria.
Übersbach is a municipality in the district of Hartberg-Fürstenfeld in Styria, Austria.
Vornholz is a municipality in the district of Hartberg in Styria, Austria.
Wenigzell is a municipality in the district of Hartberg in Styria, Austria.
Wörth an der Lafnitz is a municipality in the district of Hartberg in Styria, Austria.