Arsuz-Ulucinar is one of the localities of İskenderun; it had 918 registered voters at the 2011 parliamentary election.
CHP took 450 of the 764 valid votes cast in the neighborhood at that election (58.9%). That puts the neighborhood 15.4 points above the party's district average. At the 2010 referendum 78.8% of the neighborhood voted 'no' — 18.4 points above the district average.
The picture has not changed since 2009: CHP has finished first in all of the last 4 elections. Turnout at the 2009 local election was 90.4%, 5.4 points above the district average.