Police records of reported rape, compiled for the Federal Bureau of Investigation Uniform Crime Reports, in Houston, Texas for 1974 and 1975, were analyzed in relation to ethnicity and age of victim/offender, and time and place of occurrence. Blacks had the highest race-specific rates for both victims and offenders; the majority of all rapes were intraracial. The high-risk age group for both victims and offenders was from 20 to 24 years. Rapes increased slightly during the summer months, peaked during the hours of darkness, and were fairly evenly distributed among the days of the week. The weekend calculated as from 4:00 pm Friday to 8:00 am Monday accounted for 43.6 per cent of all rape occurrences. The majority of rape events involved the use of a lethal weapon and took place in a residence.