Introduction and Aim: Increasing elderly population has led to increased attention to the concepts of quality of life in the past decades. This study was conducted to investigate the quality of life of citizens of Ilam city related factors in 2013.

Materials and Methods: This study is a descriptive, cross-sectional study, and its samples included 200 senior of Ilam who were randomly selected using cluster sampling from Quality of life index of the studied samples by the Persian version of the twenty six-question questionnaire quality of life published by the world health organization. SPSS 19, descriptive statistics, t-test and ANOVA were used for the data analysis.

Findings: Data obtained on four aspects of physical health, mental health, social relationships and environmental health, and the overall performance of quality of life of senior citizens showed that the mean score of QOL in physical health 48.86, mental health 51.33, social relationships 56.33 and environmental health was 45.88. The total mean score of quality of life of elderly people was 50.29. Moreover, the findings also showed that the average quality of life in older men (58.62±2.59was higher than the quality of life of older women (42.7±1.51). Also, there was a significant relationship between the quality of life and gender, education level and marital status (P<0.03), and the relationship with issues such and age, employment status and insurance was not statistically .

Conclusion: the results showed that the samples had a medium of quality of life. Therefore, there is the necessity to have a strategy to help people to improve and maintain overall health and quality of life.