Hepatitis B virus (HBV) can be transmitted during blood donation. This study estimated the pooled prevalence of hepatitis B and associated risk factors in blood donors in Ethiopia. The study followed the Preferred Reporting Items for Systematic Reviews and Meta-Analysis guidelines. PubMed, African Journals Online (AJOL), the Excerpta Medica database (EMBASE), SCOPUS, Web of Science, Google Scholar, and JSTOR were accessed. Articles were searched from the Addis Ababa University research repository. The core search terms and phrases were "Hepatitis", "Hepatitis B", "Blood Donation", "Blood Donor", "Transfusion", "Transfusion Transmissible Infections", "Ethiopia", "Addis Ababa", "Adama", "Bahirdar", "Dire Dawa", "Gondar", "Mekelle", "Hawassa". The data were analyzed based on a DerSimonian-Laird random-effects model using STATA 14 and Review Manager version 5.3. I-2 was used to quantify between-study heterogeneity. Leave-one-out sensitivity analysis was done. Twenty-seven articles with 308,188 samples were included in the meta-analysis. The studies used HBsAg to diagnose hepatitis B. The pooled prevalence of HBV infection among blood donors was 4.91% (95% CI: 4.21-5.60; I-2 = 99%). Male sex (p < 0.001), replacement donors (p = 0.007), history of tooth extraction (p < 0.001), and sharp material sharing (p < 0.001) were associated with increased risk, while being a repetitive blood donor was associated with a decreased risk of being infected with HBV (p = 0.02).