According to the National Center for Education Statistics (NCES), in the 2015-2016 school year 19% of undergraduates in the United State reported having a disability.
For more information about what types of disabilities were reported, ethnicity of respondents, a comparison of the types of disabilities reported by men versus women, and other respondent characteristics data, visit the table titled Percentage distribution of undergraduate students enrolled in postsecondary institutions, by disability status and selected student characteristics: 2015-16.