This article provides a general description of the nature and scope of violence and harassment against lesbians and gay men in the United States. It summarizes the results of local, state, and national surveys, and discusses gender and recial/ethnic differences in types and incidence of victimizations. The article examines anti-gay violence and harassment in such contexts as the home, schools, college and university campuses, and prisons and jails. There is a discussion of the perpetrators of anti-gay violence and the growing role of organized hate groups in such attacks. The article also examines time trends in anti-gay violence and the possible relationship between such violence and increasing public awareness about AIDS. It concludes with a discussion of the limitations of existing data and the need for greater attention to the issue.