Bayirli ranks 15th by electorate among the 20 localities of Samsat. The neighborhood has a single ballot box, and 60 voters were registered there for the 2023 parliamentary election.
The neighborhood parts ways with the district as a whole. At the 2023 parliamentary election it went to CHP with 33 votes, while across Samsat the leading party was AK Parti, with CHP here running 48.5 points above its district average. In the presidential runoff, 36 of 61 valid votes went to Recep Tayyip Erdoğan — 31.0 points below the district average. At the 2017 referendum 61 of 69 valid votes were 'yes' — 5.6 points below the district average.
Turnout at the 2024 local election was 100.0%, 14.8 points above the district average. The tightest race came at the 2015 parliamentary election: CHP took 35 votes to AK Parti's 34 — a margin of just 1 vote. First place has changed hands 4 times here since 2009. The electorate shrank from 76 registered voters in 2011 to 60 in 2023 — a change of about 21 percent.