Abstract-Locus of control (LOC) refers to individuals' perceptions about the underlying main causes of events in their lives. Multiple intelligences (MI), as another psychological concept, deals with the various aspects of intelligence each individual may possess. This paper reports the results of a study designed to examine any relationship between LOC and MI on the one hand, and any possible relationship between each of these two constructs and reading proficiency, as a language component, on the other. To this end, 59 EFL students from University of Sistan & Baluchestan and Islamic Azad University of Zahedan answered a 28-item LOC questionnaire, a 90-item intelligence questionnaire, and a reading comprehension section of a TOFEL test. The results indicated no significant relationship between LOC and MI; however, a significant relationship was observed between MI and reading proficiency. Among the different domains of intelligence, the visual intelligence made the greatest contribution in predicting reading proficiency. The relationship between LOC and reading proficiency also was significant. In other words, a significant positive correlation was found between internal orientation and reading proficiency as well as visual intelligence and reading scores. It can be concluded that LOC and MI are significant variables regarding reading proficiency and should be highly considered while developing strategies for reading instruction Index Terms-locus of control, multiple intelligences, reading proficiency