Introduction: As the low and middle income countries transitioning towards increasing older population, the need of assessing and improving mental health among older adults is also becoming important. The objective of the study is to assess the prevalence of depression and to find out the determinants influencing depression among older adults in six low and middle income countries. Methods: The data from the WHO Study on Global Ageing and Adult Health (SAGE) Wave1 was used. Assessment of depression was based on the three depressive symptoms reported by respondents. Results: The Prevalence of depression among older adults (per hundred population) was found to be highest in India (27.4) followed by Mexico (23.7) and Russia (15.6). Female adults were suffering more from depression compare to male older adults. Older adults living in rural areas had less depression compare to elderly living in urban areas in Ghana, Mexico and Russia. Lower wealth and low educational attainment was found to be significantly influencing depression among older adults. Study also showed positive association between presence of any other morbidity and depressive symptoms. Discussion: It is important to find out that low socio-economic conditions do play an important role in influencing mental health of older adults in low-middle income countries. Future development of health services for older people in these countries should be adaptable to different socio-economic context prevalent in these low-middle income countries