PurposeAlthough a significant share of undergraduates, first-generation college students (FGCS) remain difficult to characterize. Consequently, academic libraries are challenged to identify the services most important to FGCS. This study measured the perceived importance of and satisfaction with library services among undergraduate students at an R1 land-grant university. The study further compared FGCS’s perceptions of library services with those of their non-first generation peers.Design/methodology/approachThe authors measured importance and satisfaction using the Measuring Information Services Outcomes (“MISO”) Survey. They further analyzed responses according to first-generation status. The authors then compared mean scores and used the Wilcoxon rank-sum test to find statistical differences in perceived importance and satisfaction between first-generation and non-first-generation respondents.FindingsThe difference between first-generation and non-first-generation student responses was statistically significant for 35% of library services. FGCS rated library services higher than their non-first-generation peers for both importance and satisfaction. FGCS perceived library services related to physical spaces and access/discovery as most important. Library services that provide student support or access to technology showed strong evidence of difference between first-generation and non-first-generation student responses. The authors also determined the MISO Survey is a measure for assessing FGCS perceptions of library services.Originality/valueThis study adds quantitative evidence to research on FGCS and academic libraries, further demonstrating the importance of library services to FGCS.