The aim of this study is to examine the relationships between reading fluency, writing fluency, speaking fluency, reading comprehension, and vocabulary. A correlational survey method was used in the research. The data for the study were collected in the 2018-2019 academic year. A total of 94 5th grade students from 9 different schools, 8 state schools and 1 private school, in the city center of Kars formed the study group and the socioeconomic levels of the students were homogeneous. According to the results, vocabulary is the skill with the highest number of correlations with other skills, which indicates the importance of vocabulary. Fluency skills had a relationship with each other in some dimensions such as accuracy and speed. Reading comprehension skills were correlated with other variables mostly in three dimensions (total score, scores for informative text, and scores for inferential questions), although not in all dimensions. The results of the study are discussed in light of the literature.