This article describes the first national survey of violence against women in Pakistan from 2001 to 2004 covering 23,430 women. The survey took account of methodological and ethical recommendations, ensuring privacy of interviews through one person interviewing the mother-in-law while another interviewed the eligible woman privately. The training module for interviewers focused on empathy with respondents, notably increasing disclosure rates. Only 3% of women declined to participate, and 1% were not permitted to participate. Among women who disclosed physical violence, only one third had previously told anyone. Surveys of violence against women in Pakistan not using methods to minimize underreporting could seriously underestimate prevalence.