This study aims to identify the relationship between stress and sleep quality in the elderly using a correlative descriptive design. Determining the size of the sample using the power analysis table with a level of significance (α) of 5%, power (1-β) of 80% and an effect size of 40%, so that the sample size in this study is 50 elderly people who live in Raya Bayu Village, Raya District, Simalungun Regency. Sampling used simple randomized sampling according to the research criteria. Data collection was carried out from 2 to 30 June 2018 using a questionnaire consisting of 3 parts, namely the Demographic Data Questionnaire (KDD), Stress Questionnaire (KS), and Elderly Sleep Quality Questionnaire (KKTL). From the data analysis it is known that all respondents (100%) fall into the category of mild stress levels and almost all respondents (84.9%) have poor sleep quality. Respondents reported sleep duration at night < 5 hours (48%), length of time needed to start sleeping > 60 minutes (56%), frequency of waking up at night 3-4 times (52%), most respondents (60 %) woke up intermittently, when they woke up the respondents still felt a little sleepy (46%) and the majority of respondents were dissatisfied with their sleep (50%). And from the research it was found that stress has a moderate negative relationship to sleep quality in the elderly (r = -0.454) with an acceptable significance value (p <0.05), Respondents reported sleep duration at night < 5 hours (48%), length of time needed to start sleeping > 60 minutes (56%), frequency of waking up at night 3-4 times (52%), most respondents (60 %) woke up intermittently, when they woke up the respondents still felt a little sleepy (46%) and the majority of respondents were dissatisfied with their sleep (50%). And from the research it was found that stress has a moderate negative relationship to sleep quality in the elderly (r = -0.454) with an acceptable significance value (p <0.05), Respondents reported sleep duration at night < 5 hours (48%), length of time needed to start sleeping > 60 minutes (56%), frequency of waking up at night 3-4 times (52%), most respondents (60 %) woke up intermittently, when they woke up the respondents still felt a little sleepy (46%) and the majority of respondents were dissatisfied with their sleep (50%). And from the research it was found that stress has a moderate negative relationship to sleep quality in the elderly (r = -0.454) with an acceptable significance value (p <0.05), when they wake up the respondents still feel a little sleepy (46%) and the majority of respondents are dissatisfied with their sleep (50%). And from the research it was found that stress has a moderate negative relationship to sleep quality in the elderly (r = -0.454) with an acceptable significance value (p <0.05), when they wake up the respondents still feel a little sleepy (46%) and the majority of respondents are dissatisfied with their sleep (50%). And from the research it was found that stress has a moderate negative relationship to sleep quality in the elderly (r = -0.454) with an acceptable significance value (p <0.05),