Data Source
Results are official certified data published by the Montgomery County Board of Elections, hosted in ArcGIS Online and updated after each election cycle. This tool is for informational purposes only.
DEM% and REP% — Two-Party Vote Share
All Democratic and Republican percentages use two-party vote share — each party's votes divided by the combined DEM + REP total only. This removes the effect of third-party candidates so year-over-year comparisons reflect genuine shifts in partisan support.
DEM% = DEM votes ÷ (DEM votes + REP votes) × 100
Swing
Swing shows how much a party's two-party share changed between the two selected years, in percentage points (pp). A green badge means the party gained share; a dark badge means it lost share. Badge colors are directional only — no party colors are used.
Swing = DEM% (Year B) − DEM% (Year A)
Ballots vs. Votes
Ballots cast counts each physical ballot once regardless of how many races are on it. Votes refers to votes for a specific candidate in a specific race. The Ballots columns in the municipality table use ballots cast — not the sum of candidate votes.
Turnout
Turnout reflects participation in the election as a whole, not in any specific race.
Turnout % = Total ballots cast ÷ Registered voters × 100
