Purpose: Late diagnosis of developmental dysplasia of the hip (DDH) places patients at an increased risk for surgical intervention and poor treatment outcomes. Previous studies have shown an association between patient socioeconomic factors and delayed diagnosis of DDH. The purpose of this study is to examine the relationship between patient socioeconomic factors and the treatment and outcomes of patients with DDH. Methods: A retrospective review of patients presenting with DDH to a tertiary pediatric hospital from 2003 - 2012 with a minimum of 2 years of follow up was conducted. The relationship between patient socioeconomic factors and late presentation (>3 months of age), treatment, and functional and radiographic outcomes was examined. Patient socioeconomic factors included insurance status (public vs. private), primary household language (English vs. non-English), and ethnicity (Hispanic vs. non-Hispanic). Results: A total of 188 patients met criteria. Patients with late presentations were more likely to be Hispanic (61.5% [72/117] vs. 44.3% [31/70] p=.02). However, public insurance and a non-English language were not significantly associated with late presentation. Patients with range of motion limitations at final follow up were more likely to have public insurance (32.5% [38/117] vs. 18.8% [12/64], p = .05) and be Hispanic (32.8% [38/116] vs. 18.8% [13/69], p=.04). Hispanic patients (32.6% [28/86] vs. 54.1% [33/61] p = .01) and patients with a non-English language (26.4% [14/53] vs. 50.0% [44/88], p = .01) had a lower nonoperative treatment success rate. Hispanic patients had more surgical procedures performed than non-Hispanic patients (1.35±1.12 vs. .99±1.27, p = .04). While 65% of patients presenting with DDH had public insurance, only 46% of patients presenting to our institution’s orthopaedic department had public insurance. Conclusions: Public insurance, a non-English language, and Hispanic ethnicity are risk factors for inferior functional outcomes and decreased nonoperative treatment success for DDH. Public insurance and a non-English language were not significant risk factors for late presentation, suggesting that other factors may contribute to the inferior outcomes observed in these patients. Understanding how these factors influence outcomes is critical for the development of more effective screening, educational, and policy initiatives.