The study investigated proficiency in research writing among post-graduate students in the Faculty of Education, Rivers State University, Nigeria. The study was guided by two research objectives and two research questions. Descriptive survey research design was used for the study with a population of 247 PhD students in three Departments in the Faculty of Education, Rivers State University, Nigeria. A simple random sampling technique was used to pick 10 students from each of the three departments, giving a total of 30 students as sample for the study. A well-constructed instrument titled “Questionnaire for Measuring Research Writing Proficiency Skills among Post Graduate Students, (QMRWPSPGS) was used for this study and was validated by expert judgment with a reliability index of 0.76. Descriptive statistic was used to answer the research questions. Findings showed that students from the three Departments under study to a high level possess research writing information seeking proficiency but their level of possession of methodological skill was to a low level. The researcher recommended that graduate students cease solely depending on the courses offered by their colleagues if they want to become proficient in all the elements of research writing.