Background: Effective manpower is the main factor in success and significant achievement of health organizations. Objectives: This study was conducted to assess nursing perceptions regarding performance indicators and its correlation with productivity within the emergency departments of hospitals affiliated to Shahid Beheshti University of Medical Sciences in Tehran, Iran, during year 2016. Methods: This study was conducted by the cross sectional method, during year 2016. In this cross sectional study, the emergency departments of 4 hospitals of Shahid Beheshti University of Medical Sciences in Tehran were assessed. All nurses of emergency departments were selected through Census sampling methods. One of the researchers made a set of questionnaires for the assessment of the performance of nurses and a checklist as a means of productivity indicators to collect the data. Statistical analysis was conducted by the SPSS software version 18 and Pearson correlation test, T test, and analysis of variance (ANOVA). Results: The performance of the nurses had a positive aptitude with the percentage of the patients, whose condition was determined within 6 hours and the percentage of the remaining patients, whose condition was resolved within 12 hours in the studied hospitals. On the contrary, the performance of the nurses had a negative correlation with average triage duration in the studied hospitals. Moreover, according to Pearson’s correlation coefficient, it could be said that the performance of the nurses had a negative correlation with unsuccessful CPR percentage indicator and also with the percentage of discharge against medical advice in the studied hospitals. Conclusions: According to the results, in order to achieve maximum outputs as productivity, the dimensions of performances needed to be improved. The Kardex evaluation items and shift reception evaluation achieved the lowest scores and need greater attention.