Onsen-Kisla is one of the localities of Kahramanmaras Merkez; it had 908 registered voters at the 2011 parliamentary election.
AK Parti took 84.4% in the neighborhood at that election. Across Kahramanmaras Merkez the same party stood at 80.3%, putting the neighborhood 4.2 points above the district average. At the 2010 referendum 95.6% of the neighborhood voted 'yes'; across the district that was 89.4%.
The picture has not changed since 2009: AK Parti has finished first in all of the last 4 elections. Turnout at the 2011 parliamentary election was 96.9%, 6.6 points above the district average.