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Objective To define the different breastfeeding interventions that promote breastfeeding exclusivity and duration in the late preterm infant and to synthesize findings from the published empirical literature on late preterm infant breastfeeding interventions. Data Sources The databases CINAHL, Scopus, and PubMed were searched for primary research articles on breastfeeding interventions for late preterm infants. Inclusion criteria included original research studies in which authors examined a breastfeeding intervention or second-line strategy in a sample inclusive of but not necessarily limited to the gestational age range of 34 to 36 6 7 weeks gestation, written in English, and published between 2005 and 2015. Study Selection Thirteen articles were identified, including five randomized controlled trials, three quasi-experimental studies, four descriptive studies, and one case study. Data Extraction Whittemore and Knafl's methodology guided this integrative review. Data extraction and organization occurred under the following headings: author and year, study design, level of evidence, purpose, sample, setting, results, limitations, recommendations, and intervention. Data Synthesis Studies on breastfeeding interventions were synthesized under four concepts within the Late Preterm Conceptual Framework: Physiologic Functional Status, Care Practices, Family Role, and Care Environment. Conclusion Most breastfeeding interventions within this integrative review had positive effects on exclusivity and duration of breastfeeding in the late preterm infant. However, second-line strategies had equivocal effects on exclusivity but had positive effects on duration. The positive effects of breastfeeding interventions on breastfeeding exclusivity and duration are highlighted in our results, and we point to the need for a focus on breastfeeding after the transition home for late preterm infants.