11 percent of American citizens do not possess a government-issued photo ID; that is over 21 million citizens.
"...The Brennan figure has been cited widely and comes from a 2006 survey conducted by an independent polling firm, Opinion Research Corp. Respondents were asked whether they have a current government-issued ID with their photo on it, like a driver’s license or military ID. If they answered yes, they were asked if this photo ID had their current address and current name, as opposed to maiden name.
They also were asked if they had a U.S. birth certificate, naturalization papers or passport in a place they could easily get to if they had to show it the next day and whether those documents had their current name.
According to the Brennan Center, as many as 11 percent of U.S. citizens — more than 21 million — did not have current government-issued photo identification. This was based on a sample of 987 randomly selected voting-age citizens contacted by telephone. The pollster reported a margin of error of plus or minus 2 percentage points...
We looked for other data and made some calls to ask. A 2005 report from a federal voting rights commission chaired by former President Jimmy Carter and former Secretary of State James A. Baker said in a footnote that about 12 percent of the United States voting-age population did not have driver’s licenses. The figure came from U.S. Department of Transportation and Census Bureau data.
We also found a May 24, 2011, report from Norman Robbins, research director for Northeast Ohio Voter Advocates, that examined driver’s license data specifically in Ohio. The report concluded that 940,000 Ohioans over age 18 lacked driver’s licenses. That’s nearly an 11 percent rate, higher than figures cited by proponents of Ohio voter ID laws. Robbins said in his findings that previous figures were erroneous because they failed to take into account such factors as deceased license holders and Ohioans who had moved out of state but were still in the state license database...
We start with the fact that a number of authorities say her source is credible. Daniel Tokaji, a law professor at Ohio State University, told us that he, too, thinks the Brennan figure "is in the ballpark." He cited another study, "The Disproportionate Impact of Voter ID Laws on the Electorate," done recently by researchers at universities in New Mexico, Arizona and Washington who used national survey data from the 2008 election. From 4,563 respondents, they found that 95 percent of registered white voters said they had current drivers licenses or state-issued photo IDs, while 90 percent of black voters, 89 percent of Latino voters and 86 percent of Asian voters did..."