The sociocultural approach to writing strategy use emphasizes the importance of context and the mediating resources that learners can use to enhance the quality of their performance in writing (Lei, 2008). Accordingly, the present study explored the sociocultural strategy use of a convenient sample of 105 BA level students of English Language and Literature who had passed essay-writing courses in a state university in Iran by analyzing their responses to the items of a newly-developed sociocultural strategy use questionnaire consisting of different sub-scales, namely, artifact-mediated, rule-mediated, community-mediated and role-mediated strategies. The results of the descriptive statistics revealed that the tool-mediated strategies, which are the subcategory of artifact-mediated strategies, had the highest frequency of use which is rather justified in the context of Iran. In addition, the students’ overall strategy use and their writing ability were correlated and a statistically significant relationship was found between these two variables. However, the results of the multiple regression analysis indicated that none of the sub-scales had a unique predicting power in accounting for the learners’ writing ability. The researchers also compared the sociocultural strategy use of more- and less-skilled student writers and found a significant difference in the strategy use of different individuals.