This paper aims at making a content analysis of 124 MA and Ph.D. theses in the field of environmental education that were published by Turkish universities from 2012 to 2016. These were selected based on keywords about environmental education. Among the 133 theses on the environment by in the Turkish universities, 124 out of them were identified as being related to the topic of solely environment education. In the analysis, first, these theses were cross-analyzed by published years, university, department and research topic. Next, these theses on different sub-topics were analyzed according to their research settings, participants, research design types, and research methods. The findings showed that the highest number of these were carried out in Gazi University, MA, most theses were carried out in the department of sciences, mixed method was mostly used in these theses, the setting of environmental education and the importance of environmental education were mostly chosen as research topics, the population of the study was mostly chosen among the university students and secondary school students, environmental attitude scale was mostly used as data collection tool and parametric tests were frequently used. Suggestions about the future studies on environmental issues were made at the end of the study.