Sinekli is one of the localities of Silivri. The neighborhood has a single ballot box, and 266 voters were registered there for the 2011 parliamentary election.
The neighborhood parts ways with the district as a whole. At the 2011 parliamentary election it went to CHP with 128 votes, while across Silivri the leading party was AK Parti with 41.1%, leaving CHP at 40.2%. At the 2010 referendum 186 of 242 valid votes were 'no'; across the district the 'no' share was 58.1%.