Is voter fraud a problem in the US?

No, voter fraud is not a significant or widespread problem in U.S. elections. It occurs at extremely low rates—typically measured in thousandths or hundred-thousandths of a percent of ballots cast—and has virtually never altered the outcome of major (federal or statewide) elections. Isolated individual cases happen and are prosecuted, but extensive research, audits, court reviews, and databases from across the political spectrum show it is rare and not systemic.[1]

Key Evidence on Scale

Consensus from sources including NPR, academic researchers (e.g., MIT Election Lab), election officials of both parties, and courts is that fraud is “infinitesimally rare” and almost never occurs at a scale that affects outcomes.[1]

Has It Changed Outcomes?

Researchers and reviews have found almost no modern major U.S. elections flipped by voter fraud. Occasional local or historical examples exist (e.g., some small-city races with absentee irregularities, or very old cases like aspects of the 1948 Texas Senate primary), and extremely close races can theoretically be sensitive, but presidential, congressional, and most statewide results have not been overturned due to proven widespread ballot fraud. The 2020 election faced dozens of lawsuits; nearly all failed due to lack of evidence of fraud sufficient to change results. Audits, recounts, and bipartisan processes reinforced the certified outcomes.[6]

Why Is It Rare? Safeguards and Incentives

U.S. elections have multiple layers of protection: voter ID or affidavit requirements in many places, signature verification for mail ballots, bipartisan poll watchers and canvass boards, provisional ballots, post-election audits/risk-limiting audits, cross-checks (e.g., via ERIC in participating states), chain-of-custody rules, and criminal penalties (fines, jail time, deportation for noncitizens). Intentional fraud risks serious consequences for little gain (one extra vote). Most irregularities turn out to be administrative errors, misunderstandings, or unintentional (e.g., forgetting one already voted by mail).

Claims of massive fraud often rely on unverified anomalies, statistical misunderstandings, or inflated initial flags that shrink dramatically upon investigation. Undetected fraud is possible in theory, but large-scale schemes would be hard to hide given the decentralized, observed nature of U.S. elections and repeated failures to produce evidence in court or audits.

Context and Caveats

Fraud is illegal and unacceptable wherever it occurs; prosecutions and improved list maintenance (e.g., removing deceased or moved voters) are appropriate. Perception of fraud is higher among some groups (often along partisan lines) than the data support, which can erode trust. Debates over election rules (ID, mail voting, registration) often mix genuine integrity concerns with access issues. However, the factual record shows voter fraud itself is not a material threat to the integrity or outcomes of U.S. elections.