To evaluate associations of maternal social determinants of health (SDOH) with language outcomes of preterm infants with public and private insurance. Single center study of 375 neonates born ≤ 28 weeks. Perinatal characteristics were collected, and the Bayley III was administered at 18-24 months. Primary outcome was language scores of <85. Bivariate and multivariable analyses were used to compare groups. Mothers with public insurance had higher rates of psychosocial risk factors. In regression analysis, People of Color (aOR 2.4, 1.47-4.04), non-English speaking household (aOR 4.05, 1.47-11.15) and public insurance (aOR 2.03, 1.18-3.49) significantly increased the odds of having a language composite score of <85, whereas breast milk (aOR 0.47, 0.28-0.79) was protective. Preterm infants with public insurance are at increased risk of exposure to multiple SDOH which are independently associated with language delay at 18-24 months.