The purpose of the study was to examine word learning in preschool children from families who differed in socioeconomic status (SES). Preschool children (N = 58) were assigned to SES groups based on maternal education and completed a dynamic assessment of explicit word learning 2 times. At the first administration, no SES-group differences were observed. At the second administration, children from high-SES homes had significantly higher scores than children from low-SES homes on the production probe with a large effect size (d = 1.01). Descriptively, children in both groups responded more frequently at more difficult prompting levels at the second session, but children in the low-SES group had more incorrect responses than children in the high-SES group. Additional research using sensitive measures of word-learning proficiency is necessary to better understand the way in which SES and early language experiences are related to word learning in young children.