The present research reports the findings of the study that sought to examine the in-service training needs of in-service EFL teachers in the language testing and assessment field. With this aim, four domains of language testing and assessment field were identified which were classroom-focused LTA, knowledge of testing and assessment, purposes of testing, and content and concepts of LTA. Quantitative research design was employed in this study and quantitative data was collected through a questionnaire. A total of 300 in-service EFL teachers working in different formal and non-formal education institutions participated in this study. The quantitative data was analyzed using descriptive statistics. Results indicated that these in-service EFL teachers need an intermediate level of further training in the LTA field. The area where need for training was expressed more was "content and concepts of LTA" and "classroom-focused LTA" was the domain where need for in-service training was revealed less. The findings of this study will serve as needs analysis for in-service programs and will be beneficial for curriculum development, teacher education programs, and more specifically assessment courses offered in pre- and INSET programs.