The purpose of this study was to examine the social and behavioral factors associated with pregnancy history among a sample of African American adolescent girls recruited from a short-term juvenile detention center in order to better understand the needs of this vulnerable population. Data were collected from a sample of 188 detained African American, 13-17-year-old girls in Atlanta, Georgia, who participated in a larger HIV prevention study. An audio computer-assisted self-interviewing survey was completed by participants to obtain information on socioecological factors to include individual, parental/familial, sexual risk, psychosocial, and substance use factors. Among the 188 participants, 25.5 % reported a history of pregnancy. A multivariable logistic regression model showed that girls with a history of pregnancy were more likely to live in a household receiving government aid, use hormonal contraceptives at last sex, participate in sex trading, have casual sex partners, have condomless sex in the past 90 days, and have a history of physical abuse. Girls with no history of pregnancy were more likely to have been incarcerated at least twice and to have previously used alcohol. Detention-based interventions and pregnancy prevention programs for this vulnerable population may benefit by addressing factors related to sexual behavior and development, substance use, individual background, and psychosocial health.