Do Voter ID Laws Reduce Turnout?
The claim is that requiring photo identification (ID) at the polls stops people voting, minority voters most of all. An often-quoted figure says Latino turnout was 10.3 points lower in states with strict photo ID laws. This page sets that figure beside a national study of voter records, studies of single states and a government audit.
Jump to the verdict ↓This page is about whether requiring photo ID at the polls reduces how many people vote, in the United States. It covers fraud only as far as is needed to say what ID can and cannot address; the evidence on how much fraud exists is on the voter fraud page. It is not about mail ballots, registration purges, or polling-place closures.
Not by much. Measured falls in turnout after voter ID laws are small or absent. The largest study, of the voting records of nearly every voting-age American from 2008 to 2018, found none. Studies of Georgia, Rhode Island and South Carolina found falls of less than half a percentage point. A government audit found falls of about 2 to 3 points in Kansas and Tennessee in 2012. There, the fall was larger among Black registrants than among white registrants.
Which laws the studies are about
Thirty-six states have laws asking for or requiring some form of identification at the polls, by the count of the National Conference of State Legislatures in September 2026.
The conference sorts the laws by two questions: whether the ID must carry a photo, and what happens to a voter who has none. Under a non-strict law, at least some voters without ID can cast a ballot that counts with no further action. For instance, they can sign an affidavit of identity or be vouched for by a poll worker. Under a strict law, the voter casts a provisional ballot that counts only after further steps, for instance returning to an election office within a few days with ID.
Fourteen states had strict laws in force in 2026, ten of them requiring photo ID. The studies on this page are mostly about the smaller group of states whose laws are strict.
Studies built on voter records, which show whether a named person voted, have found effects from none to about 3 points. The largest estimates, among them the 10.3-point figure, came from a study built on surveys matched to voter records. A replication found that the study’s data could not support firm conclusions.
The national study found no fall
In 2021 the Quarterly Journal of Economics published a study by Enrico Cantoni and Vincent Pons. The study is built on what the authors call “the largest individual-level dataset ever assembled to study voter participation”. It follows the registration and voting records of nearly every voting-age American from 2008 to 2018, the same people election after election. It compares states that adopted strict ID laws with states that did not. The dataset holds 1.6 billion observations.
The turnout and registration figures below come from what the authors call their most demanding specification. This model compares each voter’s own record in years with and without a strict law. Its fixed effects allow for lasting differences between states and between voters, and for anything shared by every state in an election year.
How to read it: each row is one quantity Cantoni and Pons measured, with the point estimate first. In brackets is the 95% confidence interval (CI), the range the data is consistent with. A negative number means turnout fell; a positive one means it rose. Every range in the turnout, registration and non-white turnout rows crosses zero, which means the study cannot tell an effect apart from no effect at all. The campaign-contact row is statistically significant at the 5 percent level.
Their own summary is that the laws have no negative effect on registration or turnout, overall or for any group defined by race, gender, age or party. Across all voters, the lower end of the turnout row’s confidence interval rules out a fall in turnout of more than 3.0 points. Among voters in neighbouring counties on either side of a state border, the authors rule out a fall of more than half a percentage point.
The authors rule out a fall in non-white turnout, relative to white turnout, of more than 0.5 points. So on this design, the larger harm to minority voters that the claim is about does not appear.
The campaign-contact row is one the authors flag themselves. It comes from a separate model, without voter fixed effects. In states that passed these laws, the share of non-white voters who told a survey that a campaign had contacted them rose by 4.7 points. The authors suggest party mobilisation might have offset some direct effect of the laws on minority turnout. Their own estimate of that offset, from studies of canvassing, is about a third of a percentage point.
The laws were 4 to 14 years old when the authors wrote, so they cannot rule out effects that appear later. They note that enforcement could tighten and party mobilisation could fade. They do not see their results as “the last word on this matter”. They also note that the states which adopted strict laws had different turnout levels beforehand, though not different trends, which is what their design depends on.
Studies of single states found small falls
Most studies of single states match voter records to licence records, so they can see who lacked ID. They measure the fall among those voters against voters who had it. Studies of single states have found falls in turnout after ID laws, mostly small.
| State and election | Study | What it found |
|---|---|---|
| Georgia, 2008 | Hood and Bullock, 2012 | Turnout lowered by about 0.4 points overall; no racial difference found |
| North Carolina, 2016 primary | Grimmer and Yoder, 2021 | A 0.7-point fall among the 3% of voters without ID, against voters with ID |
| Rhode Island, 2016 presidential election | Esposito, Focanti and Hastings, 2019 | A 2.7-point fall among people without a licence; a 0.42-point fall in all votes |
| South Carolina, 2014 | Hood and Buchanan, 2020 | Turnout lowered by 0.19 percent; no racial difference found |
| Virginia, 2014 | Hopkins and others, 2017 | Turnout higher where more voters lacked a licence, possibly because of a state mailing to them |
A fall measured against voters with ID is not the same as a fall in total turnout. Cantoni and Pons point out that such a result is consistent with an overall effect that is negative, null or even positive.
In North Carolina the effect outlasted the law. After the law was suspended, voters without ID were 2.6 points less likely than voters with ID to vote in the 2016 general election.
The Government Accountability Office (GAO) ran its own comparison in 2014. It set Kansas and Tennessee, which began requiring photo ID in 2012, against four states that made no change: Alabama, Arkansas, Delaware and Maine. Between the 2008 and 2012 general elections, turnout fell further in Kansas than in the comparison states, by an estimated 1.9 to 2.2 points. In Tennessee the estimate was 2.2 to 3.2 points. The GAO says its estimates are limited to that election in those two states and do not apply to other states or periods.
In Kansas and Tennessee, turnout fell further among Black registrants than among white registrants: by 3.7 points more in Kansas and 1.5 points more in Tennessee. The GAO found no consistent equivalent for Asian American or Latino registrants, which it said suggests the laws did not have larger effects on those groups.
Officials in Kansas, Tennessee and Arkansas disagreed with how the GAO chose the states it compared, and Kansas and Tennessee questioned the reliability of one of its three data sources. The GAO answered that no evaluation outside an experiment can account for every unobserved factor, and stood by its method.
The GAO also reviewed ten earlier studies, all covering general elections before 2008. Five found no significant effect on turnout. Four found significant decreases, and one found an increase.
Where the 10.3-point figure comes from
The 10.3-point figure comes from a working-paper version of a study by Zoltan Hajnal, Nazita Lajevardi and Lindsay Nielson. The working paper used validated turnout, checked against voter records, from national surveys of the 2008 to 2012 elections. For general elections, its model put Latino turnout 10.3 points lower in states with strict photo ID laws, and turnout among multiracial Americans 12.8 points lower.
The article published in the Journal of Politics in 2017 does not contain either figure. With no other factor taken into account, it says, Latino turnout was 7.1 points lower in strict ID states than in other states in general elections. The article’s model then allows for other state election laws, the contests on the ballot, how competitive the state was, and voters’ age, education and other traits. It predicts that Latinos are “10% less likely to turn out”.
A year later, in the same journal, Justin Grimmer, Eitan Hersh, Marc Meredith, Jonathan Mummolo and Clayton Nall replicated the published article. The rules for matching survey respondents to voter records had changed over time and differed between states, so the errors in measured turnout changed over time too.
In most state-years the method overstated turnout by about 25 points. In 15 states the method understated turnout by about 10. Where votes had not been checked against the records, as in Virginia before 2012, the coding implied turnout close to zero. Models fitted to years before the laws existed produced apparent effects of laws not yet passed.
Their conclusion: “When errors are corrected, one can recover positive, negative, or null estimates of the effect of voter ID laws on turnout, precluding firm conclusions.”
That is not a smaller effect. It is a statement that this data and this design cannot answer the question in either direction.
Two of the original authors, Hajnal and Lajevardi, replied in the same issue with John Kuk, under the title “We All Agree: Strict Voter ID Laws Disproportionately Burden Minorities”. They argued that the replication’s own reanalysis confirmed their core finding, “that strict voter ID laws discriminate”. That is a claim about who bears the burden, and it does not restore the 10.3-point figure.
A separate study shows who a strict ID law would stop from voting. In 2016 a court order let Texans without the required ID vote if they showed another document and signed a declaration saying why they lacked it. Bernard Fraga and Michael Miller linked about 16,000 of these declarations to the Texas voter file.
In their January 2021 draft, Black voters were 11.4% of Texans who voted with ID in 2016 and 16.1% of those who voted without it. Latino voters were 19.8% of those with ID and 20.7% of those without. Their race is estimated from each voter’s surname, address, sex and date of birth, not recorded. Under the strict law in force in 2014, the authors say, the Texans who voted without ID would have been turned away.
What photo ID can address
Photo ID at a polling place stops one thing. It stops a person turning up and voting as someone else. It does not touch mail ballots, registration, or anything done by an official.
Justin Levitt, a law professor, tracked every specific, credible allegation of voter impersonation he could find from 2000 to 2014 and published the list in 2014. He found about 31 incidents, some involving more than one ballot, in a period when general and primary elections alone drew more than a billion ballots. He bet that some of the 31 would turn out to be errors.
The Heritage Foundation, a conservative think tank, keeps a database of proven cases of election fraud. It says the database is a sampling, not a complete count.
In 2017 the database was reviewed by the Brennan Center for Justice at New York University School of Law. The center argues against the strictest ID laws. The database then listed 749 cases involving almost 1,100 people. Ten of the cases were in-person impersonation at the polls. At its update of 12 December 2025 the database listed 1,619 cases from 1982 to 2025, 34 of them impersonation. Impersonation was 1.3 percent of the cases in 2017 and 2.1 percent in 2025.
How to read it: these counts were collected over decades and are not on the same denominator, so they cannot be compared directly. Photo ID can address the two impersonation rows. The row it cannot address, absentee ballots, is the larger one, in a database Heritage built to show “the vulnerabilities in the election system”.
In 2008 the Supreme Court upheld Indiana’s ID law in Crawford v. Marion County Election Board. Justice Stevens’s lead opinion, joined by two other justices, says the only kind of voter fraud the law addresses is in-person impersonation at polling places. It adds that the record contains no evidence of any such fraud ever occurring in Indiana.
The opinion upheld the law on other grounds, including Indiana’s interests in modernising elections, in deterring fraud seen elsewhere and in a 2003 Indiana mayoral primary, and in public confidence. For confidence it quoted the 2005 report of the Carter-Baker commission, chaired by former President Jimmy Carter and former Secretary of State James Baker. The report said: “The electoral system cannot inspire public confidence if no safeguards exist to deter or detect fraud or to confirm the identity of voters.” The next section tests the confidence argument.
One study has tested it. Cantoni and Pons counted cases before and after strict ID laws in the Heritage database and in a second one, compiled by News21, an investigative project by university students. They found no significant fall in either. Both databases list very few cases, 0.02 to 0.08 a year for every 100,000 residents. The authors note that a law can change how many cases are detected as well as how many happen. They also found no effect on how common people thought impersonation was.
The strongest case for the laws
The case does not depend on impersonation being common. Heritage itself says it is “not making any definitive claims about the extent of election fraud”.
A safeguard against a rare crime is not worthless because the crime is rare; locks on doors are not refuted by low burglary rates in a neighbourhood. The national study finds no turnout cost, so the safeguard appears close to free. Advocates point to other democracies that require identification to vote. And the burden, where it exists, falls on a step that most citizens complete routinely for banking, travel and employment.
Two of these four arguments hold up: the rarity argument is coherent, and the national study’s result is real.
The international comparison is weaker than it looks, and it fails on a detail rather than on principle. The countries it names either supply ID widely or do not require photo ID. So the United States is being compared with countries that require ID and supply it.
Mexico’s voter card is free, and 99 percent of the people on its electoral roll hold a valid one. India’s Election Commission said in 2019 that more than 99 percent of electors held its photo identity card. Canada does not require photo ID in federal elections and lets a voter without ID be vouched for. Britain brought in photo ID at polling stations in May 2023. It created a free Voter Authority Certificate for voters without other photo ID.
The argument that ID is a routine step runs into evidence on cost. A free card is not a free process when the documents needed to obtain it are not free. In Texas, the free election certificate required documents such as a birth certificate, which cost $2 to $3 until 2015. The district court relied on an expert’s estimate that Black registered voters were 305% more likely than white voters to lack accepted ID, and Latino registered voters 195% more likely. The appeals court upheld the finding of a discriminatory effect built on that estimate.
One more point for the laws, and the sharpest, comes from the Indiana case. There the district judge found that the challengers had not produced evidence of a single individual resident who would be unable to vote because of the law. The judge also rejected as unreliable an expert estimate that up to 989,000 registered Indiana voters lacked acceptable identification. A claim that a law disenfranchises people is owed at least one person it disenfranchised, and in that record nobody produced one.
Texas later produced such a record: the court-ordered declarations of 2016 named about 16,000 voters who, by Fraga and Miller’s account, would have been turned away under the strict law.
Proponents also argue that requiring ID increases public confidence in elections. Cantoni and Pons found no significant effect of strict ID laws on whether people thought an election fair, or on how common they thought impersonation was.
A survey study of 2014 by Bowler and Donovan found confidence split by party. Republicans were more confident in strict photo ID states than in states without ID laws, and Democrats less. Across about 30 national surveys, Sances and Stewart found a consistent link between voting for the winner and confidence in how elections are run. In a post on their paper, they argue that an ID law may shift confidence only through its effects on who votes and who wins.
The verdict: what the evidence shows
Not by much. Measured on voter records, the effect of ID laws on turnout runs from no detectable fall, in the national study of 2008 to 2018, to about 2 to 3 points. That larger effect was in Kansas and Tennessee in 2012. Most studies of single states found falls of less than half a percentage point.
The burden is not spread evenly. In Kansas and Tennessee the fall was larger among Black registrants than among white registrants. Texans who voted without ID in 2016 were disproportionately Black and Latino. Studies of Georgia and South Carolina, though, found no racial difference. The often-quoted 10.3-point fall in Latino turnout comes from a working paper and cannot be relied on.
This article concludes that: (1) where turnout has been measured on voter records, ID laws have reduced it by little or nothing, from no detectable fall nationally to about 2 to 3 points in Kansas and Tennessee in 2012; (2) the fall was larger among Black registrants than among white registrants in Kansas and Tennessee, and Texans who voted without ID in 2016 were disproportionately Black and Latino; (3) the 10.3-point figure for Latino turnout cannot be relied on.
These conclusions would be falsified by:
• A study on voter records from elections after 2018 finding a fall in total turnout larger than the 3.0 points the national study rules out for all voters
• Records from other states showing that voters without ID, or those whose provisional ballots go uncounted for lack of ID, are no more often Black or Latino than other voters
• A survey-based estimate of the effect on Latino turnout that passes the replication’s tests, including its placebo test on years before the laws


