Documented cases of voter fraud are very rare
Documented cases of in-person voter fraud are rare.
The Department of Justice charged 19 people who weren’t from the United States with voter fraud in the 2016 election out of 138 million people who voted. Additionally, the Washington Post found four examples of alleged voter fraud that made the news and lead to arrests.
That totals to 23 people out of 138 million who were accused of voter fraud in the 2016 election or around .00000017%.
Additionally, a report from the Brennan Center for Justice investigated allegations and found incident rates of suspected voter fraud ranged from 0.0003% to 0.0025%.