A surprisingly large share of state legislative seats are decided long before Election Day — by the absence of a competitive challenger. In some states, more than a third of legislative generals each cycle feature only one major-party candidate. These races barely cost money, generate no news, and produce wide partisan gaps in chambers that can look superficially competitive on paper.
The chart below tracks that structural gap nationally, cycle to cycle since 2010. Below it, this page also collects every individual state-level general election we have on file where the winner was the only candidate on the ballot, or where the nearest challenger received under 5 percent of the vote — a related but distinct measure, browsable by state, chamber, year, party, and whether the winner was an incumbent.
Share of Legislative Seats Uncontested by a Major Party
Of all state legislative general-election seats nationwide, the share where one of the two major parties fielded no candidate at all — a structural measure of major-party presence, distinct from the vote-share list below. Even-numbered cycles only, 2010–2024 (odd-year off-cycle states are too small a sample to compare); 2026 is excluded since it's still in progress, with most states not yet through their primary, and isn't yet comparable to a completed cycle.
Browse All Unopposed Races
All Unopposed Races
| Year | State | District | Winner | Incumbent? | Field | Vote Share |
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Methodology
Two different measures on this page. The chart above and the browse list below use two distinct, deliberately different definitions of "uncontested." The chart asks a structural question — did one of the two major parties fail to field ANY candidate for this seat — regardless of what a minor-party or write-in candidate did. The list below asks a competitiveness question — did the winner face a real fight, by either measure. A seat can be "contested" by the chart's definition (both a Democrat and a Republican filed) while still appearing in the list below (if the loser only drew token support). See each section for its own definition.
A race counts as "unopposed" in the browse list below under either of two conditions: (1) the winner was the only candidate listed on the general election ballot, or (2) the winner faced opposition but the nearest challenger received under 5 percent of the total vote. The 5% threshold catches races with only token write-in or third-party opposition, where the practical outcome was identical to a single-candidate ballot.
Why include both. Ballot-access rules vary by state. Some states list write-in slots that always produce a "second candidate" with very few votes; others drop unopposed candidates from the ballot entirely (Hawaii does this for some legislative races under HRS §12-41). Counting only zero-opponent races would under-state how often state legislative outcomes are effectively predetermined.
What's not included. Primaries — many of which are routinely unopposed but follow different competitive dynamics. Special elections — where last-minute filing windows make "unopposed" less informative. And jurisdictions like Nebraska's nonpartisan unicameral, where the top-two primary structure makes the general election competitive almost by definition.
Coverage window. 2010 forward. Vote totals and percentages are sourced from the underlying election records — where votes aren't recorded in our database (notably some unopposed Generals that are never reported by state SoS offices because no contest occurred), the race still appears here based on candidate count, but the vote share column shows a dash.