Short answer: Voter fraud exists in the U.S., but measured rates are very low. It occasionally affects very close local races; there’s no credible evidence of widespread fraud altering national outcomes.
What the best evidence shows
•Measured incidence: Multiple large reviews have found extremely small rates of individual voter fraud. For example, one review found 31 credible cases of in‑person impersonation out of more than 1 billion ballots (2000–2014). Another synthesis places studied fraud rates around 0.0003%–0.0025%.[1]
•Double voting claims: The leading academic study of interstate “double voting” found such cases to be rare and showed that a popular cross‑state matching system (Crosscheck) produced >99% false positives if used to purge rolls.[2]
•2020 national checks: Federal and state officials reported no evidence of fraud on a scale that would change the presidential outcome; a multistate election‑security group called 2020 “the most secure” in U.S. history, Georgia’s full hand audit matched the machine outcome, and DOJ leadership said they found no evidence of widespread fraud affecting results.[3]
•Documented local problems: Proven schemes have led courts to order new elections or primaries—e.g., the 2018 NC‑9 U.S. House race (absentee‑ballot operation), Paterson, NJ’s 2020 municipal race (mail‑ballot fraud), and Bridgeport, CT’s 2023 mayoral primary (illegal absentee‑ballot handling, with subsequent criminal charges in 2025). These show fraud can matter in very close, low‑turnout contests.[4]
•Tracking “proven cases”: A right‑leaning tracker (Heritage) compiles convictions and overturned elections across decades; even it describes the database as a non‑comprehensive sampling of proven cases, not evidence of widespread fraud.[5]
Bottom line
•Yes, voter/election fraud happens—but at very low rates nationally. Safeguards like paper ballots, audits, signature checks, and prosecutions are designed to catch problems, and the available evidence indicates they’ve been effective at preventing or limiting large‑scale fraud. The larger integrity risks identified by researchers tend to involve absentee‑ballot handling and administrative vulnerabilities in close local races, not mass in‑person impersonation at the polls.[2]
If you’d like, I can tailor a summary of how your state prevents, detects, and prosecutes voter fraud.
3.[19
We improved the security of systems, scanning](https://www.govinfo.gov/content/pkg/CHRG-116shrg43071/pdf/CHRG-116shrg43071.pdf?utm_source=openai)
Backs: “The leading academic study of interstate “double voting” found such cases to be rare and showed that a popular cross‑state matching system (Crosscheck) produced >99% false positives if used to purge rolls.”
Backs: “Federal and state officials reported no evidence of fraud on a scale that would change the presidential outcome; a multistate election‑security group called 2020 “the most secure” in U.S. history, Georgia’s full hand audit matched the machine outcome, and DOJ leadership said they found no evidence of widespread fraud…”
Backs: “A right‑leaning tracker (Heritage) compiles convictions and overturned elections across decades; even it describes the database as a non‑comprehensive sampling of proven cases, not evidence of widespread fraud.”