Researchers / Alan Dunst / Michigan Duplicate Voter Registration Report
Report · Data as of July 2, 2026 · 10 pages
Michigan Duplicate Voter Registration Report
Mid-year review of potential duplicate voter registrations identified in Michigan's Qualified Voter File, and how Michigan election clerks have resolved them.
Headline findings
- 28.2% → 49.6%of jurisdictionshave no identified potential duplicates now, compared with the start of the project.
- 260 → 133 → ~102new per monthAverage new potential duplicates per month in 2024, in 2025, and from January to June 2026.
- 10,258investigationscompleted by clerks. 198 (about 1%) required no administrative action.
- 17.5% / ~53%Wayne CountyWayne has about 17.5% of registered voters and about 53% of the remaining potential duplicates. Detroit has 6.3% of voters and 43% of the remaining.
How potential duplicates are flagged
Each potential duplicate is flagged by one of five matching algorithms. They compare names, birth year and address, and each produces higher-confidence and lower-confidence matches. Clerks investigate each flagged pair.
The algorithms look for: the same or similar address, birth year and names; the same names with a different last name (for example a marital name change); the same names and birth year at a different address in the same jurisdiction; the same names and birth year in different jurisdictions; and the same name and address with birth years that differ by up to ten years.
Source: the author's Michigan Duplicate Voter Registration Report, data as of July 2, 2026. The report states about 11,641 potential duplicates remain statewide.