With 61 voters on the roll at the 2023 parliamentary election, Demirkapi stands 43rd among the 50 localities of Hamur, and its votes were cast at one ballot box.
44 people voted at that election. Yeşil Sol Parti took the most votes with 28; AK Parti followed with 6. Yeşil Sol Parti's share here is 14.2 points above the district average. In the presidential runoff, 26 of 35 valid votes went to Kemal Kılıçdaroğlu — 16.7 points above the district average. At the 2017 referendum 36 of 56 valid votes were 'yes' — 6.8 points above the district average.
The tightest race came at the 2011 parliamentary election: AK Parti took 37 votes to independents's 33 — a margin of just 4 votes. Turnout at the 2024 local election was 63.5%, 12.3 points below the district average. At the 2024 local election the neighborhood went to AK Parti with 19 votes, while Hamur as a whole was won by DEM Parti. The electorate shrank from 77 registered voters in 2011 to 61 in 2023 — a change of about 21 percent.