Background: Hospital readmission is one of the important priorities of health systems due to its impact on the cost and quality of hospital care and imposing an additional burden on the health system. Complications are much more severe in patients who are readmitted to the hospital, with high mortality, increased length of stay, and a 25% increase in medical costs. Objective: This study aimed to evaluate the prevalence of psychiatric readmission and associated factors in Shafa Psychiatric Hospital in Rasht during the years 2017-2019. Methods: The research method is descriptive-analytical and applied in terms of results. The statistical population of this study consisted of all patients admitted to Shafa Hospital of Rasht during 2017-2019. Sampling method: This study was a convenience sampling with a sample size of 196 people. Data were entered into SPSS 24 software. Descriptive data were expressed as mean, SD, frequency (percentage of frequency). Binomial and χ2 tests were also used to compare the frequency of the 2 groups in a population. Results: The results of this study showed that having a criminal record significantly increases the frequency of readmission, involuntary hospitalization, being single, and not having a readmission risk job. Conclusion: On the basis of the results, it is suggested that the follow-up of patients and providing hospitalization for emotional support and recommendation for appropriate medication can be helpful and reduce the rate of readmission.