The aim of this study was to examine the relationship between nutrition knowledge and dietary intakes among university students. The students (264 males and 741 females) were asked to answer a validated General Nutrition Knowledge Questionnaire and to fulfil a Food Frequency Questionnaire. Gender, university status (freshmen, juniors, seniors) and eating arrangements (home, restaurants, self-cooking) were used as predictors of the relationship between nutrition knowledge and dietary intake. The findings indicated that women (p = 0.008), senior students (p < 0.001) and those who prepare food for themselves (p = 0.038) have higher nutrition knowledge scores. The assessment of nutrition knowledge had parallels in dietary intake, and adherence to the dietary recommendations was significantly associated with nutrition knowledge scores (p < 0.001). Regression analysis showed differences in daily intakes of grains (p < 0.001), meat and beans group (p < 0.001), vegetables (p < 0.001), fruits (p = 0.002) and oils (p < 0.001) in relation to all predictors. However nutrition knowledge acted as a modifier of the influence of eating arrangements. Logistic regression has shown that students with the highest nutrition knowledge are twelve times more likely to have a diet in accordance to recommendations compared to students with the lowest level of knowledge ([OR] = 12.03, 95% [CI] = 6.64-21.79, p < 0.001). The results support the value of including nutrition knowledge in health education campaigns targeting the student population with the aim of improving their dietary intake.