Insomnia is one of the sleep problem that caused by stress, school or job problem, health problem, smooking, and also side effects from medication. Insomnia affect quality of life such as lowering someone concentration. Based on Statistic by Country for Insomnia, found as much as 10% incident of insomnia in Indonesia. The aim of this researce was To determine the correlation between insomnia severity with learning concentration among nursing students in Yogyakarta. This research was quantitative study with correlational design used cross-sectional approach. The sample of this research were 91 respondens colecting using proportional stratified random sampling technic. The data were collected by questionnaires that have been tested for validity and reliability. Data analysis using Spearman Rank statistical test. The results of this study show that more than a half of the participants have insomnia severity in the low category (57,1%) and learning concentration in the moderate category (73,6%). Analysis by Spearman Rank showed p value 0,013 (<0,05). There was correlation between insomnia severity and learning concentration among nursing students in Yogyakarta, so it is recommended for suggestions for further researchers to explore more deeply about the factors that affect the degree of insomnia and concentration of learning on the students to have a good learning concentration.