Gender-based violence (GBV) against women and girls is pervasive and has negative consequences for sexual and reproductive health (SRH). In this systematic review of reviews, we aimed to synthesize research about the SRH outcomes of GBV for adolescent girls and young women in low- and middle-income countries (LMICs). GBV exposures were child abuse, female genital mutilation/cutting, child marriage, intimate partner violence (IPV), and non-partner sexual violence. PsycINFO, PubMed, and Scopus searches were supplemented with expert consultations, reference-list searches, and targeted organizational website searches. Reviews had to contain samples of girls and young women ages 10-24, although inclusion criteria were expanded post-hoc to capture adolescent-adult combined samples. Twenty-seven reviews were quality-rated. Study-level data were extracted from the 10 highest quality reviews (62 unique studies, 100 samples). Reviews were mostly from Africa and Asia and published between 2011 and 2015. We found consistent associations between GBV and number of sexual partners, gynecological conditions (e.g., sexually transmitted infections [STIs]), unwanted/unplanned pregnancy, and abortion. Some types of IPV also were associated with greater use of contraception/STI prevention. Addressing GBV is essential to improve SRH for girls and women in LMICs.