A single ballot box served Marmara Kadin Kapali Ceza Infaz Kurumu at the 2023 parliamentary election, with 66 registered voters; that places it 45th among the 45 localities of Silivri.
72 people voted at that election. CHP took the most votes with 29; AK Parti followed with 23. CHP's share here is 7.2 points above the district average. In the presidential runoff, 47 of 67 valid votes went to Kemal Kılıçdaroğlu — 11.9 points above the district average.
Turnout at the 2024 local election was 10.5%, 69.5 points below the district average. The tightest race came at the 2023 parliamentary election: CHP took 29 votes to AK Parti's 23 — a margin of just 6 votes. First place has changed hands 3 times here since 2023.