Onsen-Kisla is one of the localities of Kahramanmaras Merkez; it had 908 registered voters at the 2011 parliamentary election.
AK Parti took 738 of the 874 valid votes cast in the neighborhood at that election (84.4%). That puts the neighborhood 4.2 points above the party's district average. At the 2010 referendum 95.6% of the neighborhood voted 'yes' — 6.1 points above the district average.
Turnout at the 2011 parliamentary election was 96.9%, 6.6 points above the district average. The picture has not changed since 2009: AK Parti has finished first in all of the last 4 elections.