Background: Despite the importance of breastfeeding, most U.S. women do not meet recommendations for length of any or exclusive breastfeeding. Support in primary care settings is a recommended intervention (USPSTF 2016), but optimal strategies to implement this support are not well-established. We sought to evaluate the effect on any and exclusive breastfeeding of implementing integrated breastfeeding support within an academic family medicine clinic. Methods: We conducted a retrospective chart review of all infants 10 months before and 10 months following the implementation of integrated breastfeeding support provided by an IBCLC or MD-IBCLC. 281 infants were identified, 140 before implementation and 141 after. A trained research assistant extracted data from the electronic medical record, including demographics, relevant medical history, and infant diet at 2, 4 and 6 months into a Qualtrics tool. Bivariate and multiple logistic regression analyses were performed in STATA. Results: There were no significant demographic differences before and after the intervention. The proportion of infants who were breastfed at 2, 4, and 6 months was greater in the post-implementation group (71.7% vs. 86.7% at 2 months, p=0.05; 61.5% vs. 77.1% at 4 months, p=0.08; and 50.7% vs. 64.4%, p=0.09 at 6 months). The proportion of infants who were exclusively breastfed was also greater in the post-implementation group (58.7% to 77.8% at 2 months; p=0.04, 50.5% to 54.2% at 4 months, p=0.06; and 44.0% to 49.3% at 6 months, p=0.12). Logistic regression models showed similar results, and controlling for a priori determined covariates of interest increased the odds of any and exclusive breastfeeding at all time points. Conclusion: Providing integrated, IBCLC breastfeeding support services within an academic family medicine clinic is associated with significant increases in in any and exclusive breastfeeding. These results support the provision of lactation services onsite at locations where mothers and children receive primary care.