The purpose of this study was to investigate the relation between selected demographic and clinical characteristics and quality of life (QOL) scores in patients with end-stage renal disease who receive dialysis. We conducted the study at one hemodialysis (HD) unit in Bahrain from May 2018 to July 2018. We used standard QOL Index (QOLI) score instrument in Arabic form. This study included 100 patients (66 men and 34 women), aged 22 to 80 years on treatment with maintenance HD for four to 190 months. Inclusion criteria were as follows: those aged >18 years with no severe morbidities or psychological diseases and were on dialysis for at least three months. The following QOL scores were recorded: the health and functioning domain (64.8 ± 15.3), the social and economic domain (65.6 ± 14.1), the psychological/spiritual domain (74.9 ± 14.3), and the family subscale domain (75.9 ± 14.5). Male patients had reduced QOL though not statistically significant and younger patients had better QOL scores. The QOL scores revealed a decreasing trend with decreasing level of education, and they were higher among those who were not working and stayed at home. In addition, the family subclass scores were significantly higher among the married patients. Correlations between the demographic characteristics and QOL scores showed that there was a significant negative correlation between family domain and educational level and marital status, while there was a significant positive correlation between residence and psychological domain. Age, gender, marital status, residence, ethnicity, education level, employment status, income, and duration on HD nonsignificantly affected one or more domains of QOLI scores in such patients. Adequate management of these factors could influence patient outcomes.