The strategies are needed by non-English department student to learn English language well. It helps non-English department student to solve some obstacles in the process of learning English. This research is aimed to explore English learning strategies of non-English department student and to find out the most effective English learning strategies of non-English department student. It focused on exploring language learning strategies, some obstacles often faced by non-English department student in learning English, the types of English learning strategies, and the types of the most effective English learning strategies. This research was conducted at English Language Education Department at one private university in Yogyakarta, and three non-English department students were interviewed to gather the data. The three participants are all females and have different level of English achievement, and they are from different major sat one private university in Yogyakarta. This research adopted qualitative method, and the data was analyzed using descriptive qualitative by coding analysis to present the findings. There were eight findings divided into two categories. The first category is non-English department student strategies in learning English consisting of five themes. Those themes are by speaking English, by writing English, by reading English, by listening English, and by watching movies. By speaking English consist of practice speaking with friend and also lecturer, practice speaking English with foreigner, and also practice speaking by self-talking. Then, by reading English consist of reading novel or short stories, reading journal, an article, or E-newspaper, and also practice reading with any kinds of book. After that, by writing English consist of writing a caption and diary, writing and memorizing the new vocabularies, and writing an academic paper and free writing. The next is by listening English consist of listening to somebody else speaking (friend or lecturer), listening to the foreigner speaking, and also listening to music. The next is English visual strategy consists of watching movies and talk show. Moreover, the most effective 2 strategies in learning English for non-English department consist of three findings. Those are practice speaking English with lecturer, friend, or the foreigner (native/non-native), reading a book, journal, novel, newspaper, and any kinds of book, and the last is listening to music and listening to somebody else talk (lecturer, friend, and the foreigner).